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We put the Samsung Galaxy A15 LTE 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: 5000 mAh
- 25W charger (not included)
- 6.5-inch, 1080 x 2340, 90 Hz, OLED display
- MediaTek Helio G99 (6 nm)
- Tested ROM / RAM combination: 128 GB + 4 GB
Scoring
Sub-scores and attributes included in the calculations of the global score.
Samsung Galaxy A15 LTE
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.
29th
2nd
Pros
- Impressive autonomy performance in both indoor and outdoor use cases
- High adapter efficiency
- Very low discharging current when calling, video streaming, and when in idle
Cons
- Takes more than 1 hour and a half to fully charge the battery
- Very little autonomy regained from a 5-minute charging boost
- Below-average charge-up efficiency
The Samsung Galaxy A15 LTE demonstrated a much-improved battery performance in all the use cases over the previous Samsung Galaxy A14 5G.
Equipped with the same-sized 5000 mAh battery as in the previous generation, the Samsung Galaxy A15 LTE lasted for more than 3 days and 6 hours when used moderately, compared with the A14 5G’s 2 and half days.
The A15 LTE’s outdoor performances were also quite impressive, and ranked among the best devices that we have tested. In the standardized use-case tests, the autonomy showing was very impressive for calling and watching a video in 4G conditions, although the autonomy when listening to music was not as long lasting when compared with its competitors.
The Samsung Galaxy A15 LTE supports up to 25W charging, which requires more than 1 hour and 40 minutes to fully charge the device. Moreover, the device struggled to regain much autonomy in a 5-minute boost charging, yielding less than 4 hours, which ranked in the lower half of our database.
The Samsung Galaxy A15 LTE has a very good adapter efficiency, which is higher than 93.5%. However, the global charge-up efficiency was at 76%, which is below average. On the other hand, the device’s discharging currents were generally below or around average levels, except when listening to music, meaning that the device is well optimized.
Compared to other devices in the Essential segment (<$199), the Samsung Galaxy A15 LTE ranked among the best devices, thanks to its excellent autonomy and great efficiency performances.
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 | |
|---|---|---|---|---|---|
| Samsung Galaxy A15 LTE | 5000mAh | 25W (not included) |
- | AMOLED 1080 x 2340 |
MediaTek Helio G99 |
| Honor X7b | 6000mAh | 35W (included) |
- | LCD 1080 x 2412 |
Qualcomm Snapdragon 680 |
| Samsung Galaxy A14 5G | 5000mAh | 15W (not included) |
- | LCD 1080 x 2408 |
MediaTek Dimensity 700 |
Autonomy
Samsung Galaxy A15 LTE
197
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.
Battery Life (moderate)
8th
Battery Life (moderate)
3rd
Home/Office
Samsung Galaxy A15 LTE
221
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
Samsung Galaxy A15 LTE
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
Calibrated
Samsung Galaxy A15 LTE
198
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
Samsung Galaxy A15 LTE
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
Samsung Galaxy A15 LTE
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.
Charging Time 0-80%
134th
Charging Time 0-80%
5th
Quick boost
Samsung Galaxy A15 LTE
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.
Efficiency
Samsung Galaxy A15 LTE
154
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
Samsung Galaxy A15 LTE
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
Samsung Galaxy A15 LTE
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.