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We put the Honor X7d (400 Smart) through our rigorous DXOMARK Battery test suite to measure its performance in autonomy, charging and efficiency. In these test results, we will break down how it fared in a variety of tests and several common use cases.
Overview
Key specifications:
- Battery capacity: 6500 mAh
- 35W charger
- 6.77-inch, 720 x 1610, 120 Hz, TFT LCD display
- Qualcomm Snapdragon 685 (6 nm)
- Tested ROM / RAM combination: 128 GB + 6 GB
Scoring
Sub-scores and attributes included in the calculations of the global score.
Honor X7d (400 Smart)
224
212
Key performances
These key points are derived from the lab measurements during testing and do not figure into the overall score. The lab measurements, however, are used for the overall score.
Pros
- Outstanding overall autonomy performances
- Well optimized power consumption for most use cases
Cons
- Long charging time
- UI slightly over estimating the remaining battery level displaying 20% when the actual charge is lower
The HONOR X7d (400 Smart), just like its 5G sibling, achieves top scores in our database, thanks to its remarkable autonomy and strong efficiency. These excellent results allow it to secure the best sub-scores in both categories, confirming HONOR’s focus on battery-centered devices.
Equipped with a large 6500 mAh battery, the HONOR X7d delivers outstanding endurance, easily lasting more than four days under moderate use. It performs particularly well in gaming and video playback scenarios, where its low power consumption ensures consistent results. Compared to the HONOR X7d 5G, the 4G version stands out with even better autonomy and overall efficiency, making it the stronger choice for those who prioritize long-lasting performance.
The charging performances are average, with about 1 hour and 10 minutes to reach 80%, and a full recharge 1 hour and 36 minutes. That said, a short 5-minute top-up still provides around 6 hours of usage, which remains practical for quick boosts when necessary.
Overall, the HONOR X7d confirms itself as a highly optimized endurance device, with best-in-class results for autonomy and efficiency, and a clear advantage for users seeking maximum battery life over faster charging.
Test Summary
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. (See our introductory and how we test articles for more details about our smartphone Battery protocol.)
The following section gathers key elements of our exhaustive tests and analyses performed in DXOMARK laboratories. Detailed performance evaluations under the form of reports are available upon request. Do not hesitate to contact us.
| Battery | Charger | Wireless | Display | Processor | |
|---|---|---|---|---|---|
| Honor 400 Smart 5G (x7d 5G) | 6500mAh | 35W (not included) |
- | TFT LCD 720 x 1610 |
Qualcomm Snapdragon 6s Gen 3 |
| Motorola Edge 60 Pro | 6000mAh | 90W (not included) |
15W | pOLED 1220 x 2712 |
MediaTek Dimensity 8350 |
| Oppo Find X8 | 5630mAh | 80W (included) |
50W | AMOLED 1256 x 2760 |
MediaTek Dimensity 9400 |
Autonomy score is composed of three performance sub-scores: Home / Office, On the go, and 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.
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.
On the go
Honor X7d (400 Smart)
195
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 outdoors and perform a precisely defined set of activities while following the same three-hour travel itinerary (walking, taking the bus, the subway…) for each device
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.
Charging
Honor X7d (400 Smart)
218
Charging is fully part of the overall battery experience. In some situations where autonomy is at a minimum, knowing how fast you can charge becomes a concern. The DXOMARK Battery charging score is composed of two sub-scores, (1) Full charge and (2) Quick boost.
Full charge
Honor X7d (400 Smart)
224
Full charge tests assess the reliability of the battery power gauge; measure how long and how much power the battery takes to charge from zero to 80% capacity, from 80 to 100% as shown by the UI, and until an actual full charge.
Quick boost
Honor X7d (400 Smart)
212
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. The chart here compares the average autonomy gain from a quick 5-minute charge.
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, calibrated tests and charging evaluation, taking into consideration the device’s battery capacity. DXOMARK calculate the annual power consumption of the product, shown on below graph, which is representative of the overall efficiency during a charge and when in use.
Charge up
Honor X7d (400 Smart)
205
The charge up sub-score is a combination of four factors: the overall efficiency of a full charge, related to how much energy you need to fill up the battery compared to the energy that the battery can provide; the efficiency of the travel adapter when it comes to transferring power from an outlet to your phone; the residual consumption when your phone is fully charged and still plugged into the charger; and the residual consumption of the charger itself, when the smartphone is disconnected from it. The chart here below shows the overall efficiency of a full charge in %.
Discharge
Honor X7d (400 Smart)
194
The discharge subscore rates the speed of a battery’s discharge during a test, which is independent of the battery’s capacity. It is the ratio of a battery’s capacity divided by its autonomy. A small-capacity battery could have the same autonomy as a large-capacity battery, indicating that the device is well-optimized, with a low discharge rate.