
Xiaomi Mi 4c
Packing a significant 3,080-mAh battery, the Mi 4c looks great on paper, and, thanks to complimentary software and hardware optimization, it outperforms the competition in its price range. It easily lasts a day, and could stretch to two if you're not a heavy user.Its longevity is furthered by the device's low-resolution display and high-end processor. Additionally, it is one of an increasing number of devices to feature USB Type-C, so it gets juiced up at lightning speed.

Battery Capacity | 3,080 mAh |
Camera | 5 MP (front) / 13 MP (rear) |
Display | 5-inch IPS LCD, 1,080 x 1,920 pixels (441 ppi) |
CPU | Snapdragon 808, hexa-core |
RAM | 3 GB |
Android version | MIUI 7 on Android 5.1.1 Lollipop |
Rate | Around US$700 USD unlocked on Honorbuy |
HTC One M9
At 2840 mAh, the HTC One M9 battery is only marginally bigger than the HTC One M8's. You'd think this would be a problem considering the One M9 is running a powerful Snapdragon 810 octa-core chipset. However, the big.LITTLE technology in the processor has paid off, as the One M9 battery manages to just outperform its predecessor.Under extreme duress, like constant video-watching, the One M9 battery lasts around 13 hours, which is a decent run. However, no one in their right mind would watch a video for 13 hours straight (if you do, remember to take regular breaks), and ordinary users can expect well over a day's use out of it before needing to recharge. Another big plus with the One M9 battery is the quick-charging feature, which charges your battery around 40 percent in just half an hour (annoyingly, the fast-charging cable is not included in the box).
Battery Capacity | 2,840 mAh |
Camera | 4 MP UltraPixel (front) / 20 MP (rear) |
Display | 5.0-inch IPS LCD, 1920 x 1080 pixels (441 ppi) |
CPU | Snapdragon 810, octa-core |
RAM | 3 GB |
Android version | 5.1 Lollipop |
Rate | Around US$450 unlocked on Amazon |
OnePlus One
There are plenty of things to like about the OnePlus One - its rebellious Cyanogen OS (and now also OxygenOS), its big screen, low asking price, and, of course, its powerful 3100-mAh battery. With its Snapdragon 801 quad-core chipset, big display and 3GB RAM, there's a fair old bit to keep powered in the OnePlus One too.The OnePlus One battery handles over 13 hours of heavy usage, including constantly on internet, regular phone calls and some video viewing. For a moderate user, this converts to about one and a half day's use.
Battery Capacity | 3,100 mAh |
Camera | 5 MP (front) / 13 MP (rear) |
Display | 5.5-inch LCD, 1,920 x 1,080 pixels (401 ppi) |
CPU | Snapdragon 801, quad-core |
RAM | 3 GB |
Android version | 5.1.1 Lollipop/Cyanogen OS 12.1 |
Rate | Around US$350 unlocked on Amazon |
Samsung Galaxy Note 5
The Galaxy Note 5 remains one of the best phones money can buy, largely thanks to its fantastic camera, big and bright 5.7-inch Super AMOLED screen, and S-Pen stylus features that make it truly unique among phones and phablets.All these impressive features run smoothly thanks to the Note 5's Exynos 7420 octa-core chipset, which is in turn kept alive by a 3,000-mAh battery. This is slightly smaller than its predecessor's, the Note 4, but it still performs excellently.
If you're a moderate to heavy smartphone user, then you should have around 30 percent battery remaining by the end of the day, and it should see you several hours into the next day as well. The Note 4 also comes with a fast-charging feature, which can charge up to half your battery within about 30 minutes.
We're just disappointed that Samsung failed to follow the Note 4 and 5's great battery performance through to the otherwise brilliant Galaxy S6.
Battery Capacity | 3,220 mAh |
Camera | 3.7 MP UltraPixel (front) / 16 MP (rear) |
Display | 5.7-inch Super AMOLED, 2,560 x 1,440 pixels (515 ppi) |
CPU | Exynos 5433, octa-core |
RAM | 3 GB |
Android version | 5.1.1 Lollipop |
Rate | Around US$520 unlocked on Amazon |
HTC One M8
The HTC One M8 has gathered a fair share of supporters in the Android universe, and for many this is due to its laudable battery life. While it doesn't reach the level of the LG G3, and has lower specs, overall the HTC One (M8) is still one of the better devices on Android for battery performance.The 2,600-mAh battery powers a 5-inch Full-HD display and Snapdragon 801 processor. This Snapdragon processor has received a small, but significant, improvement over the previous version in terms of power consumption, and this is one of the keys to improving battery life. During normal use, you will easily find the HTC One (M8) lasting more than a day.
- HTC One (M8) hands-on review
- HTC One (M8) tips and tricks
- HTC One (M8) vs Galaxy S5 power saving modes

Battery | 2,600 mAh |
Camera | 5 MP (front) / 4 MP (Ultrapixel) (back) |
Display | 5-inch LCD, 1,920 x 1,080 pixels (441 ppi) |
CPU | 801 quad-core Snapdragon |
RAM | 2 GB |
Android version | 5.1.1 Lollipop |
Rate | Around US$250 unlocked on Amazon |
Samsung Galaxy S5
The Samsung Galaxy S5 is strong performer in a number of areas, not least in the battery department. For a start, the Galaxy S5 battery is removable, unlike some of the others on our list, meaning you can carry around a spare and swap them if necessary.Another interesting aspect of the Galaxy S5's 5.1-inch Super AMOLED display, which has the advantage of consuming less battery than competing displays. Finally, the Galaxy S5 comes with a number of unique-to-Samsung power-saving modes like Ultra Power Saving which can help add precious hours, or even days, to the Galaxy S5 battery. Samsung even pulled a publicity stunt with a week-long, cross-country road trip on a single charge.

Battery Capacity | 2,800 mAh |
Camera | 2.1 MP (front) / 16 MP (rear) |
Display | 5.1-inch AMOLED, 1,920 x 1,080 pixels (432 ppi) |
CPU | 801 quad-core Snapdragon |
RAM | 2 GB |
Android version | 5.1.1 Lollipop |
Rate | Around US$350 on Amazon |
Sony Xperia Z3
The Sony Xperia Z3 has a battery capacity of 3,000 mAh, curiously lower than that of the older Xperia Z2. The key, however, is in how Sony has optimized the Xperia Z3's hardware. The Xperia Z3 is another smartphone in the 2-day battery life camp, often capable of hitting this benchmark with juice left in the tank. Unfortunately, Sony's omnibalance design means that, although the Xperia Z3 is water resistant, its battery is not removable. We also can't comment on how the Xperia Z3 battery will perform with the PS4 Remote Play feature. Nonetheless, it's still one of the best performing batteries for the specs it houses, with 3 GB of RAM, a Snapdragon 801 processor, and 5.2-inch full-HD screen.
Battery Capacity | 3,100 mAh |
Camera | 2.2 MP (front) / 20.7 MP (back) |
Display | 5.2-inch AMOLED, 1,920 x 1,080 pixels (424 ppi) |
CPU | 801 Snapdragon quad-core (2.5GHz) |
RAM | 3 GB |
Android version | 5.1.1 Lollipop |
Rate | Around US$380 unlocked on Amazon |
Huawei Ascend Mate 7
The Huawei Ascend Mate 7 has one of the largest batteries on the market at a huge 4,100 mAh. The giant battery is necessary, though, to power this Chinese phablet's mammoth 6-inch Full-HD screen and octa-core Hisilicon Kirin 925 processor. Despite the big specs, the device will last for about two days with normal use if it is helped along by its power-saving modes (Smart or Ultra).
Battery Capacity | 4,100 mAh |
Camera | 3 MP (front) / 13 MP (rear) |
Display | 6-inch LCD, 1,920 x 1,080 pixels (367 ppi) |
CPU | Hisilicon Kirin 925, 1.8 GHz |
RAM | 3 GB (32 GB model of memory) / 2 GB (16 GB model of memory) |
Android version | 5.1.1 Lollipop |
Prices | Around US$400 unlocked on Amazon |