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Asus Zenfone 8 Battery test: Good night power management

November 25, 2021
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102
battery
This device has been retested in the latest version of our protocol. Overall, sub-scores and attributes are up to date. For detailed information, check the What’s New article
OTHER AVAILABLE TESTS FOR THIS DEVICE

The Asus Zenfone 8 made its appearance in May 2021. Packed with features, it belongs to our Premium ($600-$799) segment. Let’s take a look at some of its key battery test results.

Key specifications:

  • Battery capacity: 4000 mAh
  • 30W charger
  • 5.9-inch, 1080 x 2400, 120 Hz OLED display
  • Qualcomm Snapdragon 888 5G chipset
  • Tested ROM / RAM combination: 128 GB + 8 GB

About DXOMARK Battery tests: For scoring and analysis in our smartphone battery reviews, DXOMARK engineers perform a variety of objective tests over a week-long period both indoors and outdoors. This article highlights the most important results of our testing. (See our introductory and how we test articles for more details about our smartphone Battery protocol.)

Test summary

Scoring

Sub-scores and attributes included in the calculations of the global score.


Asus Zenfone 8
102
battery
93
Autonomy
Home/Office
92

221

On the go
91

195

Calibrated
95

198

110
Charging
Full charge
110

224

Quick boost
111

212

115
Efficiency
Charge up
132

205

Discharge
107

194

Key performances

Charging Time
1 day 21h
Battery life
Charging Time
0h45
80% Charging time
Charging Time
1h51
Full charging time
Quick Boost
3h08 autonomy
after 5-minute charge
Please be aware that beyond this point, we have not modified the initial test results. While data and products remain fully comparable, you might encounter mentions and references to the previous scores.
BATTERY
Position in Global Ranking
147th
1. Oppo Find X7 Ultra
160
2. Honor Magic6 Pro
157
3. Honor X9b
156
3. Honor Magic6 Lite (5800 mAh)
156
5. Honor Magic5 Lite 5G
152
6. Honor X7b
151
6. Oppo Find X6 Pro
151
8. Honor Magic6 Lite (5300 mAh)
150
9. Honor X7a
147
9. Oppo Reno12 Pro
147
9. Realme GT Neo 5 (240W)
147
12. Oppo Reno6 5G
146
13. Honor 200 Pro
145
13. Honor 200
145
15. Oppo Reno12
144
15. Realme GT Neo 2 5G
144
17. Honor X9a
143
18. Samsung Galaxy S23 Ultra
142
19. Honor Magic5 Pro
141
19. Oppo Reno8 5G
141
21. Asus ROG Phone 6
140
21. Sony Xperia 10 V
140
23. Oppo Reno8 Lite 5G
139
24. Huawei P60 Pro
138
24. Nubia RedMagic 8 Pro
138
24. Oppo A77 5G
138
24. Sony Xperia 10 IV
138
28. Samsung Galaxy A15 LTE
137
29. Apple iPhone 13 Pro Max
136
29. OnePlus Nord CE 5G
136
29. Samsung Galaxy M51
136
29. Vivo Y72 5G
136
29. Vivo X80 Lite 5G
136
29. Xiaomi Redmi Note 12 Pro 5G
136
29. Xiaomi 11T
136
36. Asus ROG Phone 7
135
36. Honor Magic4 Lite 5G
135
36. Oppo Find X5 Lite
135
39. Apple iPhone 15 Pro Max
134
39. Samsung Galaxy S23+
134
39. Xiaomi Redmi Note 11 Pro 5G
134
39. Xiaomi Redmi Note 10
134
43. Apple iPhone 14 Pro Max
133
43. Oppo A74
133
43. Vivo Y76 5G
133
43. Vivo X60 Pro 5G (Snapdragon)
133
43. Xiaomi Redmi Note 11S 5G
133
43. Xiaomi 14
133
43. Xiaomi 13 Ultra
133
50. Honor X8 5G
132
50. Oppo A78 5G
132
50. Xiaomi Redmi Note 12 5G
132
50. Xiaomi Redmi Note 10S
132
54. Apple iPhone 15 Plus
131
54. POCO F5 Pro
131
54. Samsung Galaxy A72
131
54. Wiko Power U30
131
58. Oppo Reno6 Pro 5G (Snapdragon)
130
58. Samsung Galaxy S24 Ultra
130
60. Realme GT Neo 3
129
60. Samsung Galaxy A34 5G
129
60. Samsung Galaxy A23 5G
129
60. Xiaomi Redmi Note 12 Pro+ 5G
129
60. Xiaomi Redmi Note 10 Pro
129
65. Apple iPhone 14 Plus
128
65. OnePlus Nord 2 5G
128
65. Xiaomi 13
128
68. Honor 90 Lite
127
68. Nubia RedMagic 6 Pro
127
68. Oppo A94 5G
127
68. Samsung Galaxy A15 5G
127
72. Honor 70
126
72. OnePlus 10T 5G
126
72. Oppo Find X3 Neo
126
72. Xiaomi 13 Pro
126
72. Xiaomi 11T Pro
126
77. OnePlus 11
125
77. Samsung Galaxy A13 5G
125
79. Nothing Phone (2)
124
80. Huawei P50 Pro
123
80. TCL 40R 5G
123
80. Xiaomi 14 Ultra
123
80. Xiaomi 12T Pro
123
84. OnePlus 9
122
85. Apple iPhone 12 Pro Max
121
85. Oppo A74 5G
121
85. Samsung Galaxy A55 5G
121
88. Xiaomi Redmi Note 13 Pro 5G
120
88. Xiaomi Redmi Note 10 5G
120
88. Xiaomi 13T Pro
120
91. Apple iPhone 14 Pro
119
91. Nothing Phone(1)
119
91. Oppo A54 5G
119
91. Xiaomi Redmi Note 11
119
95. Apple iPhone 13 Pro
118
95. Motorola Edge 20 Pro
118
95. Nubia RedMagic 7 Pro
118
95. Xiaomi 12T
118
95. Xiaomi 12 Lite 5G
118
100. Realme GT 2 Pro
117
100. Samsung Galaxy A14 5G
117
100. Xiaomi Redmi Note 13
117
103. Honor X7
116
103. Honor 90
116
103. Oppo Find X5 Pro
116
103. Vivo Y20s
116
107. Apple iPhone 13
115
107. Crosscall Stellar-X5
115
107. Oppo Reno8 Pro 5G
115
107. Realme GT 5G
115
111. Apple iPhone 15 Pro
114
111. Huawei P40 Lite
114
111. Samsung Galaxy Z Fold5
114
111. Xiaomi Mi 10T Pro 5G
114
111. Xiaomi 13T
114
116. Apple iPhone 15
113
116. Nokia G42 5G
113
116. Samsung Galaxy A54 5G
113
116. Sony Xperia 5 IV
113
120. Apple iPhone 14
112
120. Motorola Moto G62 5G
112
120. OnePlus Nord 2T 5G
112
120. OnePlus 8T
112
124. Google Pixel 8 Pro
111
124. Motorola Moto G9 Power
111
124. Oppo Find X5
111
124. Samsung Galaxy S21 Ultra 5G (Snapdragon)
111
124. Xiaomi Redmi Note 13 Pro Plus 5G
111
129. Wiko Power U20
110
130. Oppo Find X3 Lite
109
130. Samsung Galaxy Z Flip5
109
130. Samsung Galaxy S24+ (Exynos)
109
130. Samsung Galaxy S23
109
134. Honor Magic Vs
108
134. Oppo Find N2 Flip
108
134. Samsung Galaxy S21 5G (Snapdragon)
108
134. Xiaomi Mi 11 Ultra
108
138. Samsung Galaxy S24 (Exynos)
107
138. Xiaomi Mi 11 Lite 5G
107
140. Samsung Galaxy A52 5G
106
141. Black Shark 5 Pro
105
141. Oppo Find X3 Pro
105
143. OnePlus 9 Pro
104
144. Google Pixel 8
103
144. Huawei Mate 50 Pro
103
144. Samsung Galaxy S22 Ultra (Snapdragon)
103
147. Asus Zenfone 8 Flip
102
147. Asus Zenfone 8
102
147. Google Pixel 7 Pro
102
147. Motorola moto g34 5G
102
151. Samsung Galaxy S23 FE
101
151. Samsung Galaxy A35 5G
101
153. OnePlus 10 Pro
100
153. POCO F4 GT
100
153. Samsung Galaxy S21 5G (Exynos)
100
153. Xiaomi Redmi 10 2022
100
153. Xiaomi 12
100
158. Apple iPhone 13 mini
99
158. Realme C21
99
158. Realme C11
99
158. Samsung Galaxy Z Fold4
99
158. Vivo X80 Pro (Snapdragon)
99
163. Google Pixel 7
98
163. Motorola Edge 30 Pro
98
163. Samsung Galaxy S22 Ultra (Exynos)
98
166. Google Pixel 6
97
167. Google Pixel 7a
96
167. Samsung Galaxy A33 5G
96
167. Vivo X51 5G
96
170. Honor Magic4 Pro
95
170. Samsung Galaxy Z Flip4
95
170. Samsung Galaxy S22+ (Exynos)
95
170. Samsung Galaxy A53 5G
95
170. Xiaomi Redmi 12 5G
95
175. Google Pixel 6a
94
175. Xiaomi Redmi Note 13 5G
94
177. Apple iPhone 12 mini
93
177. Google Pixel 5
93
177. Samsung Galaxy S21 Ultra 5G (Exynos)
93
180. Samsung Galaxy Z Fold3 5G
92
181. Motorola moto g54 5G
90
181. Samsung Galaxy S22 (Snapdragon)
90
183. Google Pixel Fold
88
183. Xiaomi Redmi 9
88
185. Sony Xperia 1 IV
87
185. TCL 406
87
187. Apple iPhone SE (2022)
84
188. Fairphone 5
83
189. Samsung Galaxy S21 FE 5G (Snapdragon)
82
189. Xiaomi Mi 11
82
191. Google Pixel 6 Pro
81
192. Xiaomi 12 Pro
76
193. Samsung Galaxy S22 (Exynos)
75
BATTERY
Position in Premium Ranking
27th
1. Nubia RedMagic 8 Pro
138
2. Vivo X60 Pro 5G (Snapdragon)
133
2. Xiaomi 14
133
4. Oppo Reno6 Pro 5G (Snapdragon)
130
5. Xiaomi 13
128
6. Nubia RedMagic 6 Pro
127
7. OnePlus 10T 5G
126
7. Oppo Find X3 Neo
126
7. Xiaomi 11T Pro
126
10. OnePlus 11
125
11. Xiaomi 12T Pro
123
12. OnePlus 9
122
13. Xiaomi 13T Pro
120
14. Motorola Edge 20 Pro
118
14. Nubia RedMagic 7 Pro
118
16. Realme GT 2 Pro
117
17. Apple iPhone 13
115
17. Oppo Reno8 Pro 5G
115
19. Xiaomi 13T
114
20. Apple iPhone 15
113
21. Apple iPhone 14
112
22. Samsung Galaxy S23
109
23. Samsung Galaxy S21 5G (Snapdragon)
108
24. Samsung Galaxy S24 (Exynos)
107
25. Black Shark 5 Pro
105
26. Google Pixel 8
103
27. Asus Zenfone 8 Flip
102
27. Asus Zenfone 8
102
29. Samsung Galaxy S21 5G (Exynos)
100
29. Xiaomi 12
100
31. Apple iPhone 13 mini
99
32. Motorola Edge 30 Pro
98
33. Vivo X51 5G
96
34. Apple iPhone 12 mini
93
34. Google Pixel 5
93
36. Samsung Galaxy S22 (Snapdragon)
90
37. Fairphone 5
83
38. Samsung Galaxy S21 FE 5G (Snapdragon)
82
38. Xiaomi Mi 11
82
40. Samsung Galaxy S22 (Exynos)
75

Pros

  • Good power management at night
  • Charging time from 0% to 80% is acceptable in its segment
  • Residual power drain kept under control

Cons

  • No wireless charger
  • Disappointing in music and video streaming
  • Performance in on the go tests, especially for calling and camera

Despite having specs that are similar to its competitors in this review, the Asus Zenfone 8 lags a bit behind in most tested categories.

We compared the Asus Zenfone 8’s performance with two other devices in our Premium segment, the OnePlus 9 and the Samsung Galaxy S21 5G (Snapdragon); battery capacity, tested charger, display type, and resolution, and processor specifications for all three devices are shown in the table below.

Asus Zenfone 8 OnePlus 9 Samsung Galaxy S21 5G (Snapdragon)
Battery capacity 4000 mAh 4500 mAh 4000 mAh
Charger

Wireless

30W

No

 65W

15W

25W (not included)

15W
Display type OLED OLED OLED
Display resolution 1080 x 2400 10800 x 2400 1080 x 2400
Chipset Qualcomm Snapdragon 888 5G Qualcomm Snapdragon 888 5G Qualcomm Snapdragon 888 5G

Autonomy (51)

How long a battery charge lasts depends not only on battery capacity but also on other aspects of the phone’s hardware and software. The DXOMARK Battery autonomy score is composed of three performance sub-scores: (1) Stationary, (2) On the go, and (3) Calibrated use cases. Each sub-score comprises the results of a comprehensive range of tests for measuring autonomy in all kinds of real-life scenarios. 

Light Usage
66h
Light Usage
Active: 2h30/day
Moderate Usage
45h
Moderate Usage
Active: 4h/day
Intense Usage
27h
Intense Usage
Active: 7h/day

The Asus Zenfone 8 comes in behind its rivals in all three of our autonomy test categories. Further, its battery gauge is not especially accurate, since when the battery gauge shows 20% power remaining, there is really only 17.9% left.

BATTERY
Position in Global Ranking
Battery Life (moderate)
168th
1. Honor X7b
95h
2. Honor X7a
86h
3. Vivo Y72 5G
85h
4. Honor Magic6 Pro
81h
5. Wiko Power U30
80h
6. Sony Xperia 10 IV
80h
7. Samsung Galaxy A15 LTE
78h
8. Honor X9b
77h
8. Honor Magic6 Lite (5800 mAh)
77h
10. Honor Magic6 Lite (5300 mAh)
77h
11. Oppo A77 5G
76h
12. Sony Xperia 10 V
75h
13. Honor X8 5G
74h
14. Honor Magic5 Lite 5G
74h
15. Samsung Galaxy M51
73h
16. Xiaomi Redmi Note 11S 5G
72h
17. Asus ROG Phone 6
72h
18. Asus ROG Phone 7
72h
19. Honor X9a
72h
20. Wiko Power U20
71h
21. Oppo Reno12 Pro
71h
22. Honor 200
71h
23. Xiaomi Redmi Note 10 5G
70h
24. Oppo Reno12
70h
25. Oppo A78 5G
70h
26. Vivo Y20s
69h
27. Apple iPhone 15 Pro Max
69h
28. Samsung Galaxy A15 5G
69h
29. Xiaomi Redmi Note 10
69h
30. Samsung Galaxy A13 5G
69h
31. Samsung Galaxy A72
69h
32. Apple iPhone 13 Pro Max
68h
33. Oppo Find X7 Ultra
67h
34. Xiaomi Redmi Note 10 Pro
67h
35. Samsung Galaxy S23 Ultra
67h
36. Xiaomi Redmi Note 12 5G
67h
37. Oppo Reno8 Lite 5G
66h
38. Honor Magic5 Pro
65h
39. Motorola Moto G62 5G
65h
40. Honor X7
65h
41. TCL 40R 5G
65h
42. Samsung Galaxy A34 5G
65h
43. Oppo A54 5G
65h
44. Apple iPhone 14 Pro Max
65h
45. Nokia G42 5G
64h
46. Crosscall Stellar-X5
64h
47. Samsung Galaxy A23 5G
64h
48. OnePlus Nord CE 5G
64h
49. Vivo Y76 5G
64h
50. Oppo Find X6 Pro
64h
51. Oppo A74
64h
52. Apple iPhone 15 Plus
64h
53. Motorola Moto G9 Power
64h
54. Oppo A74 5G
63h
55. Apple iPhone 14 Plus
63h
56. Xiaomi Redmi Note 12 Pro 5G
62h
57. Samsung Galaxy A14 5G
62h
58. Xiaomi Redmi Note 11 Pro 5G
62h
59. Xiaomi Redmi Note 10S
61h
60. Honor Magic4 Lite 5G
61h
61. Samsung Galaxy S23+
61h
62. Samsung Galaxy A54 5G
60h
63. Xiaomi Redmi Note 11
60h
64. Honor 200 Pro
60h
65. Xiaomi 13 Pro
60h
66. Realme GT Neo 2 5G
60h
67. Nubia RedMagic 8 Pro
60h
68. Honor 90 Lite
60h
69. Xiaomi 11T
59h
70. TCL 406
59h
71. Vivo X80 Lite 5G
59h
72. Realme C11
59h
73. Motorola moto g34 5G
59h
74. POCO F5 Pro
59h
75. Honor 70
58h
76. Oppo Find X5 Lite
58h
77. Oppo A94 5G
58h
78. Oppo Reno8 5G
58h
79. Huawei P60 Pro
57h
80. Realme C21
57h
81. Samsung Galaxy A55 5G
57h
82. Oppo Reno6 5G
57h
83. Sony Xperia 5 IV
57h
84. Xiaomi Redmi 10 2022
57h
85. Honor 90
57h
86. Xiaomi 11T Pro
57h
87. Xiaomi Redmi Note 13
56h
88. Samsung Galaxy S24 Ultra
56h
89. Xiaomi 13 Ultra
56h
90. Samsung Galaxy A52 5G
56h
91. Xiaomi Redmi Note 13 Pro 5G
56h
92. OnePlus 10T 5G
55h
93. Xiaomi Redmi Note 12 Pro+ 5G
55h
94. Realme GT Neo 5 (240W)
55h
95. Nothing Phone (2)
55h
96. Google Pixel 8 Pro
55h
97. Google Pixel 7a
55h
98. OnePlus Nord 2 5G
54h
99. Nothing Phone(1)
54h
100. OnePlus 9
54h
101. Xiaomi 13T
54h
102. Xiaomi 13
54h
103. Xiaomi Mi 11 Lite 5G
54h
104. Samsung Galaxy Z Fold5
54h
105. Apple iPhone 14 Pro
54h
106. Xiaomi 12T Pro
54h
107. Apple iPhone 13 Pro
53h
108. Motorola moto g54 5G
53h
109. Xiaomi 12 Lite 5G
53h
110. Nubia RedMagic 7 Pro
53h
111. Honor Magic Vs
53h
112. Xiaomi 14
53h
113. Xiaomi 14 Ultra
53h
114. Apple iPhone 14
53h
115. Apple iPhone 13
52h
116. Motorola Edge 20 Pro
52h
117. OnePlus 11
52h
118. OnePlus Nord 2T 5G
52h
119. Xiaomi 13T Pro
52h
120. Realme GT Neo 3
52h
121. Xiaomi 12T
52h
122. Google Pixel 7 Pro
52h
123. Realme GT 5G
52h
124. Huawei P50 Pro
51h
125. Oppo Find X3 Neo
51h
126. Xiaomi Mi 10T Pro 5G
51h
127. Samsung Galaxy S23
51h
127. Apple iPhone 15 Pro
51h
129. Apple iPhone 15
51h
130. Vivo X60 Pro 5G (Snapdragon)
51h
131. Xiaomi Redmi Note 13 5G
50h
132. Xiaomi Mi 11 Ultra
50h
133. Google Pixel 6a
50h
134. Huawei P40 Lite
50h
135. Realme GT 2 Pro
50h
136. Xiaomi Redmi 9
50h
137. Samsung Galaxy S21 5G (Snapdragon)
50h
138. Oppo Find N2 Flip
49h
139. Samsung Galaxy A35 5G
49h
140. Samsung Galaxy A53 5G
49h
141. Asus Zenfone 8 Flip
49h
142. Xiaomi Redmi 12 5G
49h
143. Oppo Find X5 Pro
49h
144. Oppo Reno8 Pro 5G
49h
145. Samsung Galaxy S24+ (Exynos)
49h
146. Google Pixel 7
49h
147. Xiaomi Redmi Note 13 Pro Plus 5G
49h
148. Samsung Galaxy S24 (Exynos)
49h
149. Apple iPhone 12 Pro Max
49h
150. Samsung Galaxy Z Fold4
49h
151. Google Pixel 8
49h
152. Samsung Galaxy S21 Ultra 5G (Snapdragon)
48h
153. Google Pixel 6
48h
154. Oppo Reno6 Pro 5G (Snapdragon)
48h
155. Oppo Find X5
48h
156. Google Pixel Fold
47h
157. Motorola Edge 30 Pro
47h
158. Samsung Galaxy A33 5G
47h
159. Samsung Galaxy S22 Ultra (Snapdragon)
47h
160. Samsung Galaxy S23 FE
47h
161. Sony Xperia 1 IV
47h
162. Samsung Galaxy Z Flip5
46h
163. Samsung Galaxy S21 5G (Exynos)
46h
164. Oppo Find X3 Lite
46h
165. Nubia RedMagic 6 Pro
46h
166. Xiaomi 12
45h
167. OnePlus 8T
45h
168. Asus Zenfone 8
45h
169. Google Pixel 5
44h
170. Samsung Galaxy S22 Ultra (Exynos)
44h
171. Oppo Find X3 Pro
44h
172. OnePlus 10 Pro
43h
173. Vivo X80 Pro (Snapdragon)
43h
174. OnePlus 9 Pro
43h
175. Samsung Galaxy Z Fold3 5G
43h
176. Samsung Galaxy Z Flip4
42h
177. Google Pixel 6 Pro
41h
178. Samsung Galaxy S21 Ultra 5G (Exynos)
41h
179. Black Shark 5 Pro
41h
180. Apple iPhone 13 mini
41h
181. Apple iPhone 12 mini
40h
182. POCO F4 GT
40h
183. Samsung Galaxy S22+ (Exynos)
40h
184. Samsung Galaxy S22 (Snapdragon)
39h
185. Honor Magic4 Pro
39h
186. Vivo X51 5G
38h
187. Samsung Galaxy S21 FE 5G (Snapdragon)
38h
188. Huawei Mate 50 Pro
38h
189. Fairphone 5
37h
190. Apple iPhone SE (2022)
37h
191. Xiaomi Mi 11
36h
192. Samsung Galaxy S22 (Exynos)
35h
193. Xiaomi 12 Pro
34h
BATTERY
Position in Premium Ranking
Battery Life (moderate)
30th
1. Nubia RedMagic 8 Pro
60h
2. Xiaomi 11T Pro
57h
3. OnePlus 10T 5G
55h
4. OnePlus 9
54h
5. Xiaomi 13T
54h
6. Xiaomi 13
54h
7. Xiaomi 12T Pro
54h
8. Nubia RedMagic 7 Pro
53h
9. Xiaomi 14
53h
10. Apple iPhone 14
53h
11. Apple iPhone 13
52h
12. Motorola Edge 20 Pro
52h
13. OnePlus 11
52h
14. Xiaomi 13T Pro
52h
15. Oppo Find X3 Neo
51h
16. Samsung Galaxy S23
51h
17. Apple iPhone 15
51h
18. Vivo X60 Pro 5G (Snapdragon)
51h
19. Realme GT 2 Pro
50h
20. Samsung Galaxy S21 5G (Snapdragon)
50h
21. Asus Zenfone 8 Flip
49h
22. Oppo Reno8 Pro 5G
49h
23. Samsung Galaxy S24 (Exynos)
49h
24. Google Pixel 8
49h
25. Oppo Reno6 Pro 5G (Snapdragon)
48h
26. Motorola Edge 30 Pro
47h
27. Samsung Galaxy S21 5G (Exynos)
46h
28. Nubia RedMagic 6 Pro
46h
29. Xiaomi 12
45h
30. Asus Zenfone 8
45h
31. Google Pixel 5
44h
32. Black Shark 5 Pro
41h
33. Apple iPhone 13 mini
41h
34. Apple iPhone 12 mini
40h
35. Samsung Galaxy S22 (Snapdragon)
39h
36. Vivo X51 5G
38h
37. Samsung Galaxy S21 FE 5G (Snapdragon)
38h
38. Fairphone 5
37h
39. Xiaomi Mi 11
36h
40. Samsung Galaxy S22 (Exynos)
35h

Stationary

Asus Zenfone 8

55

104

Vivo Y72 5G
Best: Vivo Y72 5G (104)

A robot housed in a Faraday cage performs a set of touch-based user actions during what we call our “typical usage scenario” (TUS) — making calls, video streaming, etc. — 4 hours of active use over the course of a 16-hour period, plus 8 hours of “sleep.” The robot repeats this set of actions every day until the device runs out of power. 

The Asus Zenfone 8 lasted 53 hours 37 minutes, which is 3 to 4 hours less than its rivals, but still offers more than 2 days of autonomy. It manages night dischage well, losing only 2%, compared to the OnePlus 9’s loss of 2.33%.

Typical Usage Scenario discharge curves

On the go

Asus Zenfone 8

50

96

Samsung Galaxy M51
Best: Samsung Galaxy M51 (96)

Using a smartphone on the go takes a toll on autonomy because of extra “hidden” demands, such as the continuous signaling associated with cellphone network selection, for example. DXOMARK Battery experts take the phone outside and perform a precisely defined set of activities while following the same three-hour travel itinerary for each device.

The Asus battery struggles in on the go tests, especially when calling and using its camera, though it performs almost as well as its rivals for social apps on the go.

Autonomy for on the go use cases (full charge)

Calibrated

Asus Zenfone 8

52

100

Samsung Galaxy M51
Best: Samsung Galaxy M51 (100)

For this series of tests, the smartphone returns to the Faraday cage and our robots repeatedly perform actions linked to one specific use case (such as gaming, video streaming, etc.) at a time. Starting from an 80% charge, all devices are tested until they have expended at least 5% of their battery power.

Although the Zenfone 8 is well optimized with its screen off in idle mode, it does not fare well against the competition. All video test cases drain its battery quickly, though it manages to do nearly as well as the OnePlus and Samsung when gaming.

Autonomy for calibrated use cases (full charge)

Charging (75)

The DXOMARK Battery charging score is composed of two sub-scores, Full charge and Quick boost. Full charge tests assess the reliability of the battery power gauge; measure how long it takes to charge a battery from zero to 80% capacity and from 80 to 100%; and measure how long and how much power the battery takes to go from an indicated 100% to an actual full charge. With the phone at different charge levels (20%, 40%, 60%, 80%), Quick boost tests measure the amount of charge the battery receives after being plugged in for 5 minutes. 

Wired
Wired
58%
in 30 min
0h45
0 - 80%
1h51
Full charge

Unsurprisingly, the OnePlus 9 with its 65W charger is far ahead of both the Asus and the Samsung in our charging tests.

Power consumption and battery level during full charge

Full charge

Asus Zenfone 8

76

121

Black Shark 5 Pro
Best: Black Shark 5 Pro (121)

It takes 1 hour 51 minutes to fully charge the Asus Zenfone 8 with its 30W charger, which is a bit slower than the Samsung Galaxy S21 5G (Snapdragon) with its 25W charger. The difference is that Asus decreases the charging power at around 75% capacity to conserve battery longevity, while the Samsung waits to slow charging until it gets to 87%. The OnePlus 9 takes only 33 minutes 32 seconds to achieve a full charge.

Time to full charge
BATTERY
Position in Global Ranking
Charging Time 0-80%
93rd
1. Realme GT Neo 5 (240W)
0h08
2. Black Shark 5 Pro
0h13
3. Realme GT Neo 3
0h14
4. Nubia RedMagic 6 Pro
0h14
5. OnePlus 10T 5G
0h16
6. POCO F4 GT
0h17
7. OnePlus 11
0h18
8. Xiaomi 11T Pro
0h18
9. Nubia RedMagic 7 Pro
0h19
10. Oppo Find X7 Ultra
0h20
11. Oppo Reno8 5G
0h21
12. Realme GT 5G
0h21
13. Xiaomi 12 Pro
0h21
14. OnePlus 9
0h21
15. Oppo Reno6 5G
0h22
16. Xiaomi 12T Pro
0h22
17. OnePlus 9 Pro
0h22
18. Honor Magic4 Pro
0h22
19. Oppo Find X5 Lite
0h22
20. OnePlus Nord 2 5G
0h22
21. OnePlus Nord 2T 5G
0h22
21. Xiaomi 14
0h22
23. Oppo Reno6 Pro 5G (Snapdragon)
0h22
24. Oppo Reno8 Pro 5G
0h23
25. Oppo Find X3 Pro
0h23
26. Oppo Find X3 Neo
0h23
27. Xiaomi 13 Pro
0h23
28. Oppo Find X5 Pro
0h23
29. Oppo Find X6 Pro
0h24
30. Xiaomi Redmi Note 12 Pro+ 5G
0h24
31. Vivo X80 Pro (Snapdragon)
0h24
32. Oppo Find X5
0h25
33. OnePlus 8T
0h25
34. Xiaomi 12T
0h25
35. Realme GT Neo 2 5G
0h25
36. Xiaomi Redmi Note 13 Pro Plus 5G
0h26
37. Oppo Find X3 Lite
0h26
38. OnePlus 10 Pro
0h26
39. Realme GT 2 Pro
0h26
40. Xiaomi 12
0h27
41. Huawei Mate 50 Pro
0h28
42. Nubia RedMagic 8 Pro
0h28
43. Xiaomi Mi 11 Ultra
0h28
44. Honor Magic4 Lite 5G
0h28
45. Xiaomi 13
0h29
46. Honor Magic6 Pro
0h29
47. Huawei P60 Pro
0h29
48. Honor Magic Vs
0h29
49. Xiaomi 12 Lite 5G
0h29
50. Xiaomi 13 Ultra
0h29
51. Honor 200 Pro
0h30
52. Oppo Reno12 Pro
0h30
53. Xiaomi 13T Pro
0h30
54. Xiaomi 11T
0h30
55. Huawei P50 Pro
0h30
56. Xiaomi Mi 11
0h31
57. Xiaomi Redmi Note 13 Pro 5G
0h31
58. POCO F5 Pro
0h32
59. Honor 70
0h32
60. Nothing Phone (2)
0h32
61. Oppo Reno12
0h32
62. Xiaomi Redmi Note 12 Pro 5G
0h33
63. Honor 200
0h34
64. Motorola Edge 30 Pro
0h34
65. Huawei P40 Lite
0h34
66. Xiaomi 14 Ultra
0h35
67. Asus ROG Phone 6
0h35
68. Xiaomi 13T
0h35
69. Honor 90
0h35
70. Samsung Galaxy S23 Ultra
0h37
71. Samsung Galaxy S22+ (Exynos)
0h37
72. Honor Magic5 Pro
0h37
73. Samsung Galaxy S23+
0h37
74. Asus ROG Phone 7
0h37
75. Samsung Galaxy S24 Ultra
0h38
76. Xiaomi Redmi Note 11 Pro 5G
0h38
77. Oppo A94 5G
0h39
78. Vivo Y76 5G
0h39
79. Samsung Galaxy S22 Ultra (Snapdragon)
0h39
80. Samsung Galaxy S22 Ultra (Exynos)
0h40
81. Vivo X60 Pro 5G (Snapdragon)
0h40
82. Vivo X51 5G
0h41
83. Vivo X80 Lite 5G
0h42
84. OnePlus Nord CE 5G
0h42
85. Samsung Galaxy S24+ (Exynos)
0h42
86. Motorola Edge 20 Pro
0h43
87. Xiaomi Mi 11 Lite 5G
0h43
88. Xiaomi Mi 10T Pro 5G
0h43
89. Xiaomi Redmi Note 13
0h44
90. Xiaomi Redmi Note 12 5G
0h44
91. Oppo Reno8 Lite 5G
0h44
92. Oppo Find N2 Flip
0h45
93. Asus Zenfone 8
0h45
94. Honor Magic5 Lite 5G
0h46
95. Samsung Galaxy S21 Ultra 5G (Snapdragon)
0h46
96. Nothing Phone(1)
0h47
96. Honor Magic6 Lite (5300 mAh)
0h47
98. Google Pixel 8
0h48
99. Oppo A74
0h48
100. Samsung Galaxy Z Flip5
0h48
101. Samsung Galaxy S21 5G (Exynos)
0h48
102. Samsung Galaxy S21 5G (Snapdragon)
0h49
103. Google Pixel 8 Pro
0h49
104. Samsung Galaxy S24 (Exynos)
0h49
105. Xiaomi Redmi Note 11
0h49
106. Samsung Galaxy S23 FE
0h49
107. Apple iPhone 13 Pro
0h49
108. Oppo A78 5G
0h49
109. Samsung Galaxy A23 5G
0h49
110. Oppo A77 5G
0h50
111. Samsung Galaxy S22 (Snapdragon)
0h50
111. Samsung Galaxy S23
0h50
113. Samsung Galaxy Z Fold5
0h51
114. Samsung Galaxy S22 (Exynos)
0h51
115. Samsung Galaxy A35 5G
0h51
116. Honor 90 Lite
0h51
117. Samsung Galaxy A34 5G
0h51
117. Apple iPhone SE (2022)
0h51
119. Samsung Galaxy S21 Ultra 5G (Exynos)
0h51
120. Xiaomi Redmi Note 10S
0h52
121. Xiaomi Redmi Note 10
0h52
122. Apple iPhone 12 mini
0h52
123. Apple iPhone 14 Pro
0h52
124. Samsung Galaxy A55 5G
0h52
125. Samsung Galaxy A54 5G
0h52
126. Honor X9a
0h53
127. Xiaomi Redmi Note 13 5G
0h53
128. Samsung Galaxy S21 FE 5G (Snapdragon)
0h53
129. Apple iPhone 15 Pro
0h54
130. Apple iPhone 14
0h54
131. Samsung Galaxy A33 5G
0h54
131. Xiaomi Redmi Note 11S 5G
0h54
133. Samsung Galaxy A15 LTE
0h54
134. Samsung Galaxy A15 5G
0h54
135. Apple iPhone 15 Plus
0h54
136. Xiaomi Redmi Note 10 Pro
0h55
137. Apple iPhone 15 Pro Max
0h56
138. Samsung Galaxy Z Fold4
0h56
139. Honor Magic6 Lite (5800 mAh)
0h56
139. Honor X9b
0h56
141. Samsung Galaxy A53 5G
0h57
142. Samsung Galaxy Z Flip4
0h57
143. Apple iPhone 12 Pro Max
0h57
144. Apple iPhone 13 mini
0h57
145. Samsung Galaxy Z Fold3 5G
0h57
146. Samsung Galaxy A72
0h58
147. Apple iPhone 13
0h58
148. Google Pixel Fold
1h00
149. Google Pixel 7
1h00
150. Asus Zenfone 8 Flip
1h01
151. Apple iPhone 13 Pro Max
1h01
152. Honor X8 5G
1h02
153. Apple iPhone 15
1h02
154. Google Pixel 6 Pro
1h02
155. Google Pixel 6
1h03
155. Apple iPhone 14 Plus
1h03
157. Google Pixel 7 Pro
1h03
158. Honor X7
1h05
159. Sony Xperia 1 IV
1h05
160. Sony Xperia 5 IV
1h05
161. Apple iPhone 14 Pro Max
1h06
162. Fairphone 5
1h07
163. Google Pixel 7a
1h07
164. Honor X7b
1h08
165. Honor X7a
1h10
166. Google Pixel 6a
1h11
167. Motorola moto g34 5G
1h12
168. Google Pixel 5
1h14
169. Samsung Galaxy A52 5G
1h15
170. Vivo Y72 5G
1h18
171. Crosscall Stellar-X5
1h20
172. Xiaomi Redmi 12 5G
1h20
173. Oppo A74 5G
1h21
174. Sony Xperia 10 V
1h22
175. Xiaomi Redmi Note 10 5G
1h22
176. Samsung Galaxy M51
1h23
177. TCL 40R 5G
1h25
178. Xiaomi Redmi 10 2022
1h25
179. Vivo Y20s
1h25
180. Motorola Moto G62 5G
1h26
181. Motorola moto g54 5G
1h26
182. Samsung Galaxy A14 5G
1h28
183. Samsung Galaxy A13 5G
1h30
184. Nokia G42 5G
1h33
185. Sony Xperia 10 IV
1h45
186. Wiko Power U30
1h47
187. Realme C21
1h50
188. Oppo A54 5G
1h51
189. Xiaomi Redmi 9
1h52
190. Motorola Moto G9 Power
1h53
191. Realme C11
1h56
192. TCL 406
2h02
193. Wiko Power U20
2h22
BATTERY
Position in Premium Ranking
Charging Time 0-80%
24th
1. Black Shark 5 Pro
0h13
2. Nubia RedMagic 6 Pro
0h14
3. OnePlus 10T 5G
0h16
4. OnePlus 11
0h18
5. Xiaomi 11T Pro
0h18
6. Nubia RedMagic 7 Pro
0h19
7. OnePlus 9
0h21
8. Xiaomi 12T Pro
0h22
9. Xiaomi 14
0h22
10. Oppo Reno6 Pro 5G (Snapdragon)
0h22
11. Oppo Reno8 Pro 5G
0h23
12. Oppo Find X3 Neo
0h23
13. Realme GT 2 Pro
0h26
14. Xiaomi 12
0h27
15. Nubia RedMagic 8 Pro
0h28
16. Xiaomi 13
0h29
17. Xiaomi 13T Pro
0h30
18. Xiaomi Mi 11
0h31
19. Motorola Edge 30 Pro
0h34
20. Xiaomi 13T
0h35
21. Vivo X60 Pro 5G (Snapdragon)
0h40
22. Vivo X51 5G
0h41
23. Motorola Edge 20 Pro
0h43
24. Asus Zenfone 8
0h45
25. Google Pixel 8
0h48
26. Samsung Galaxy S21 5G (Exynos)
0h48
27. Samsung Galaxy S21 5G (Snapdragon)
0h49
28. Samsung Galaxy S24 (Exynos)
0h49
29. Samsung Galaxy S22 (Snapdragon)
0h50
29. Samsung Galaxy S23
0h50
31. Samsung Galaxy S22 (Exynos)
0h51
32. Apple iPhone 12 mini
0h52
33. Samsung Galaxy S21 FE 5G (Snapdragon)
0h53
34. Apple iPhone 14
0h54
35. Apple iPhone 13 mini
0h57
36. Apple iPhone 13
0h58
37. Asus Zenfone 8 Flip
1h01
38. Apple iPhone 15
1h02
39. Fairphone 5
1h07
40. Google Pixel 5
1h14

Quick boost

Asus Zenfone 8

72

111

Realme GT Neo 3
Best: Realme GT Neo 3 (111)

The Asus Zenfone 8 provides an average of more than 3 hours of additional autonomy with a five-minute charge. This is better than the Samsung’s 2 hours 34 minutes, but the OnePlus 9 provides a whopping near-7 hours.

Asus Zenfone 8 OnePlus 9 Samsung Galaxy S21 5G (Snapdragon)
Autonomy boost (hh:mm) 20%3:19 8:26 2:38
40%3:17 5:59 2:45
60%2:33 5:28 2:09
80%1:27 4:02 1:57
Percentage boost 20%9.9 %23 %7.4 %
40%9.8 %16.3 %7.7 %
60%7.6 %14.9 %6 %
80%4.4 %11 %5.5 %
Energy consumed 20%1964 mWh4923 mWh1466 mWh
40%1944 mWh3491 mWh1528 mWh
60%1512 mWh3188 mWh1195 mWh
80%864 mWh2354 mWh1088 mWh

Efficiency (75)

The DXOMARK power efficiency score consists of two sub-scores, Charge up and Discharge rate, both of which combine data obtained during robot-based typical usage scenario testing, outdoor mobility testing, charging evaluation, and power measurements, and then take into consideration the device’s battery capacity.

Although the Zenfone 8 just edged out the OnePlus in discharge efficiency, it was quite a ways behind the Samsung, and both the OnePlus and Samsung did better than the Asus device in charge up efficiency.

Charge up

Asus Zenfone 8

75

105

Nubia RedMagic 7 Pro
Best: Nubia RedMagic 7 Pro (105)

The Asus Zenfone 8 comes in last among the three devices for charge up and charger efficiency; that said, its charger efficiency is not bad for its segment.

Discharge

Asus Zenfone 8

75

121

Apple iPhone 13 Pro
Best: Apple iPhone 13 Pro (121)

The Zenfone 8 achieves slightly better results than the OnePlus 9 in discharge efficiency, particularly in gaming and video playback. The Samsung is a better-optimized device than either the Asus or the OnePlus.

Conclusion

The Asus Zenfone 8 struggles to provide a good autonomy and charging experience, but does a decent job managing residual power drain and power consumption at night.

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