Battery Charging & Discharging Review at -20°C to 55°C on Blackview BL8800 Series

When the BV8800 was first introduced, campers, hikers, explorers, businessmen leave thumbs-up comments, telling their thrilling stories about how BV8800 helped them through days of breathtaking adventures or a whole day of intense work without bothering them for a next charge. Such credit should no doubt be given to BV8800’s 8380 mega battery that always takes no sweat to survive daily demanding tasks with decent juice left at the end of the day.

And that’s why the Blackview Design Team has gone the extra mile to refine the battery and presented the fruit of their labor in Blackview's latest additions, the Blackview BL8800 and BL8800 Pro.

Their battery capacity remains the same as the last time, but Blackview Lab has confirmed that Blackview BL8800 and BL8800 Pro have much more long-lasting 8380mAh battery performance and next-level 33W fast charge that would undoubtedly outdo their predecessor.

The 8380 battery features dual electric cores, 720hrs standby, 10hrs of gaming and a 3D copper pipe liquid cooling technology which gives as much as 8.5°C CPU temperature reduction. But some may be curious about how the battery actually performs, here are some test results about BL8800 and BL8800 Pro’s battery.

There are a lot of details to go over, but we don’t mind starting this battery test review by saying the BL8800 and BL8800 Pro.

Battery Life Tests

Discharging Test

At Room Temperature: 25°C
Scenario: play video for 1 hour
Battery level: 7% ↓
Temperature: 0.8°C ↑

In the first test, we found that an-hour of videos on Blackview BL8800 drained the battery level from 92% to 85% with only 0.8 °C of temperature increase thanks to the 3D copper pipe liquid cooling system. Since videos are often more energy-consuming, only 7% of battery loss in 60 minutes is rather impressive, especially considering BL8800 is a 5G smartphone with 90HZ touch sampling rate.

And 0.8°C of heat increase is a jaw-dropping figure, making BL8800 outperform some high-end smartphones advertising graphene cooling systems; Besides, in real life experiences, 0.8 °C heat increase is so slight that you can barely feel it with your hands. Users should be able to rely on Blackview BL8800 for long-lasting video fun or even gaming without the interruption of charging or the discomfort of hot hands.

At 25°C Scenario: play videos with only 10% juice left
Battery life: 73 mins
Temperature: 0.1°C↑

In our second test, we tested how long the Blackview BL8800 can survive when it is drained with only10% battery left. The smartphone once again surprised us with 73 minutes of duration in the case of video playing with only 0.1°C temperature increase.

If you change the scenario to game playing, the figure would only slightly drop to 55 minutes. Such an extreme battery strength would underline the importance of BL8800 in situations like having an emergency call or using navigation in an unfamiliar city while finding nowhere to charge your phone.

At 25°C Scenario: use the phone with 100% juice for a day
Battery level : 41% ↓

Blackview BL8800 also excels in daily use. We tested the phone for a day of use, including social media and web browsing, chatting apps, TikTok and calls, and it has proved astonishingly enduring with 59% battery left at the end of the day.

Meaning 2-day of daily use between charges should be fine for moderate users, and even heavy users is likely to use the phone for a whole day without next charge. Outdoor activities like business trips, working or studying in cafes or libraries, camping, hiking, or more excursions are made more pleasant with the company of ultra-lasting BL8800.

At 55°C Scenario: play video to drain the battery level from 100% to 0%
Battery life: 12hrs 12 mins
Temperature: 5.7°C ↑

Since Blackview BL8800 is a rugged phone, it should be capable of dealing with extreme environments. Wonder how well it goes through? We’ll see in the following test result.

We put the phone in a 55°C scenario and played videos on it, and guess what? It managed to survive for 12hrs and 12 mins, indicating how BL8800 is adaptive to extreme weather.

Users in regions, like Africa, having high temperatures all year around would find the phone more effective and enduring than its delicate mainstream counterparts.

At -20°C Scenario: play video to drain the battery level from 100% to 0%
Battery life: 8hrs 17 mins
Temperature: 2.9°C ↑

Although the Blackview BL8800 battery is not specially designed with low temperature-resistance, nor does it advertise such a feature, we tested BL8800 under -20°C by playing videos on it.

The result turned out to be quite surprising with 8hrs and 17 mins duration, enabling BL8800 to give full play in outdoor activities in freezing winters for adventurers, explorers, soldiers and many groups in need.

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Charging Test

At 25°C Scenario: charge the battery from 0% to 100% under standby mode
Duration: 90 mins
Temperature 2.3 °C ↑

Boasting 33W fast charge, Blackview BL8800 promises to power up its battery at lightning-speed. In the charging test, we observed it only took 30 minutes for BL8800 to go from zero to 40% battery life, but note that the process is operated under standby mode.

If we expand the charging time to 60 minutes, BL8800 managed to get 82%, while a full charge will take 90 minutes. That means BL8800 will be fully prepared by the time you finish your morning routine and ready to go to work or school, allowing you to get rid of overnight charge which could potentially cause electrical accidents or do harm to your smartphone.

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At 25°C Scenario: charge the battery from 0% to 100% while playing video
Duration: 90 mins
Temperature 12.5 °C ↑

We also put Blackview BL8800 on downloaded videos while juicing it up at the same time and found that the phone needed 90 minutes for a full charge. Charging speed seems stable and unaffected by the Wifi/4G/5G-off usage, so playing while charging should not be a problem especially when you have to reply to work emails while anxious about how much longer you have to wait for the phone to be fully juiced up.

At 55°C Scenario: charge the battery from 0% to 100% under standby mode
Duration: 2 hrs
Temperature: 19.3 ↑

In a high temperature of 55°C, Blackview BL8800 registered almost 2hrs to get a full charge, not impressive though, but it is above average. The temperature of the phone changed between 26.6°C to 45.9°C during charging, and no systematic glitch in use is observed during the change, manifesting the ultra heat-resistance of BL8800.

Hence, those who are in regions experiencing extreme high temperatures very often would love how capable BL8800 is to resist heat and survive all demanding environmental challenges both outdoors and indoors.

Note that Blackview BL8800 and BL8800 Pro share the same 5G chipset and 8380mAh battery, so the BL8800 Pro has the same battery performance as its non-pro iteration.

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The overall battery performance of BL8800 and BL8800 Pro are better than envisaged and are all that one could ask for and more. Their outstanding capability to withstand extreme low and high temperatures enables them to hold a candle to high-end rugged handsets, let alone delicate mainstream smartphones like iPhone that can’t even survive temperatures under 0°C or over 35°C.

The 33W fast charge of BL8800 and BL8800 Pro has also proved effective and quick with charging speed almost verging on those of high-end smartphones. Above all, as Blackview’s latest and best pieces, BL8800 and BL8800 Pro are now gearing up for more extreme and harsh challenges.

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