Xiaomi Mi 3 vs Xiaomi Mi 4: Winners and sinners

Battery life

The Xiaomi Mi 4 goes in this round with a tiniest of advantages - it's powered by a 3,080mAh battery, compared to the 3,050mAh unit in the Xiaomi Mi 3. Both phones will last just shy of three full days on a single battery charge, based on our custom test. The Xiaomi Mi 4 managed 2 hours more in terms of overall rating - the slim margin shouldn't be surprising, with both phones running KitKat.

Where the Xiaomi Mi 4 turned out clearly superior is 3G talk times. The latest flagship scored a little over 18 hours, almost 5 hours more than its predecessor.

Talk time

• Nokia Lumia 1520
  28:34h
• Sony Xperia Z1
  26:53h
• LG G3
  25:54h
• Samsung P6800 Galaxy Tab 7.7
  25:45h
• LG G Pro 2
  25:37h
• LG G Flex
  25:19h
• Sony Xperia T2 Ultra
  25:16h
• Huawei Ascend Mate
  25:12h
• Alcatel Hero
  25:02h
• Oppo N1
  25:01h
• LG G2
  25:01h
• Samsung Galaxy Note 3 Neo
  24:52h
• Sony Xperia Z Ultra
  24:23h
• Samsung P6200 Galaxy Tab 7.0 Plus
  22:42h
• Huawei MediaPad 7 Vogue
  22:16h
• Sony Xperia Z2
  22:13h
• HTC One Max
  22:13h
• Nokia Lumia 1320
  22:13h
• Samsung Galaxy Core LTE
  22:13h
• Nokia Lumia 1020
  22:13h
• Samsung Galaxy S5
  21:20h
• Motorola RAZR MAXX
  21:18h
• LG Optimus G Pro E985
  20:45h
• Sony Xperia Z1 Compact
  20:42h
• Motorola DROID RAZR MAXX
  20:24h
• Motorola RAZR i XT890
  20:07h
• Oppo Find 7
  20:03h
• HTC One (M8)
  20:01h
• BlackBerry Q10
  20:00h
• OnePlus One
  19:56h
• Samsung Galaxy Grand 2
  19:55h
• Samsung Galaxy Mega 6.3 I9200
  19:54h
• Sony Xperia SP
  19:49h
• Sony Xperia T3
  19:48h
• HTC Butterfly S
  19:14h
• Oppo R819
  19:03h
• Asus PadFone X
  18:45h
• Xiaomi Mi 4
  18:15h
• Samsung Galaxy Note 3
  18:12h
• LG G2 mini
  18:11h
• Oppo Find 7a
  18:11h
• Samsung I9505 Galaxy S4
  18:03h
• Sony Xperia ZR
  17:48h
• HTC One (E8)
  17:47h
• Samsung Galaxy Note II N7100
  16:57h
• HTC Desire 700 dual sim
  16:56h
• Samsung Ativ Odyssey I930
  16:41h
• Sony Xperia M2
  16:40h
• Samsung I9295 Galaxy S4 Active
  16:40h
• Nokia Lumia 930
  16:40h
• LG Nexus 5
  16:40h
• Motorola Moto E Dual SIM
  16:38h
• Motorola Moto E
  16:38h
• Sony Xperia Z
  16:03h
• Samsung Galaxy K zoom
  16:01h
• Samsung Galaxy S4 zoom
  15:32h
• LG Optimus G E975
  15:30h
• Sony Xperia ZL
  15:22h
• Nokia Lumia 720
  15:17h
• HTC Desire 816
  14:46h
• Nokia Lumia 630
  14:46h
• BlackBerry Q5
  14:31h
• Pantech Discover
  14:17h
• Huawei Ascend P6
  14:17h
• Oppo Find 5
  14:17h
• Nokia Lumia 620
  14:17h
• LG Nexus 4 E960
  14:17h
• Nokia Lumia Icon
  14:15h
• Motorola Moto G
  13:41h
• HTC One
  13:38h
• Huawei Ascend P7
  13:36h
• Nokia Lumia 520
  13:33h
• HTC One X+
  13:31h
• Sony Xperia C
  13:29h
• Xiaomi Mi 3
  13:28h
• Samsung Galaxy Grand Neo
  13:20h
• Samsung Galaxy Alpha
  13:20h
• Samsung I9190 Galaxy S4 mini
  13:10h
• HTC Desire 616 dual sim
  13:00h
• Samsung Galaxy Grand I9082
  12:45h
• LG Optimus GJ E975W
  12:39h
• HTC First
  12:31h
• Motorola DROID RAZR M
  12:31h
• Sony Xperia M
  12:31h
• Sony Xperia L
  12:30h
• Huawei Ascend P1
  12:30h
• Nokia Lumia 928
  12:27h
• Samsung Galaxy S5 mini
  12:18h
• HTC Butterfly
  12:18h
• Samsung Galaxy S III I747
  12:18h
• Samsung Galaxy Note N7000
  12:14h
• HTC One mini
  12:04h
• HTC Desire 600 dual sim
  11:58h
• Samsung I8530 Galaxy Beam
  11:58h
• Samsung Galaxy Core I8260
  11:52h
• Gionee Elife S5.5
  11:32h
• HTC Desire 500
  11:31h
• Samsung Galaxy Premier I9260
  11:30h
• HTC DROID Incredible 4G LTE
  11:25h
• Asus PadFone 2
  11:20h
• Nokia X
  11:13h
• HTC DROID DNA
  11:07h
• Samsung S8600 Wave 3
  11:07h
• LG Optimus L9 P760
  11:07h
• HTC One SV
  11:07h
• HTC Windows Phone 8X
  11:07h
• Samsung I9105 Galaxy S II Plus
  11:06h
• HTC Desire X
  11:03h
• Meizu MX3
  11:02h
• Samsung I9500 Galaxy S4
  11:01h
• Apple iPhone 5s
  10:46h
• Apple iPhone 5c
  10:18h
• Samsung I9300 Galaxy S III
  10:15h
• Samsung S7710 Galaxy Xcover 2
  10:03h
• Samsung Galaxy Express I8730
  10:00h
• Meizu MX 4-core
  10:00h
• HTC One V
  10:00h
• HTC One mini 2
  09:58h
• HTC One X
  9:57h
• HTC One S
  9:42h
• HTC One S C2
  9:42h
• Samsung I9103 Galaxy R
  9:40h
• Samsung Galaxy Ace 3
  9:32h
• HTC Sensation XL
  9:30h
• Sony Xperia J
  9:14h
• Nokia Lumia 810
  9:05h
• Acer CloudMobile S500
  9:05h
• Nokia Lumia 710
  9:05h
• Motorola ATRIX HD MB886
  9:04h
• HTC Vivid
  9:02h
• Nokia Lumia 920
  8:56h
• Nokia Lumia 610
  8:51h
• HTC Rhyme
  8:48h
• Apple iPhone 5
  8:42h
• LG Optimus 3D Max P720
  8:42h
• Sony Ericsson Xperia neo V
  8:41h
• Meizu MX
  8:39h
• Samsung I9100 Galaxy S II
  8:35h
• Samsung Galaxy S Duos S7562
  8:28h
• Nokia Lumia 800
  8:25h
• Samsung Galaxy Nexus I9250
  8:23h
• Nokia Lumia 510
  8:22h
• Samsung Galaxy Fame S6810
  8:21h
• BlackBerry Z10
  8:20h
• Samsung i927 Captivate Glide
  8:20h
• Sony Xperia T
  8:15h
• HTC Rezound
  8:10h
• Samsung Galaxy Note I717
  8:02h
• LG Optimus Vu F100S
  7:57h
• Apple iPhone 4s
  7:41h
• LG Optimus 4X HD P880
  7:41h
• Samsung Focus S I937
  7:25h
• Nokia Lumia 900
  7:21h
• Samsung Galaxy S Blaze 4G T769
  7:14h
• Samsung Rugby Smart I847
  7:09h
• Nokia Lumia 820
  7:09h
• Sony Xperia acro S
  7:09h
• Nokia N9
  6:57h
• Sony Ericsson Xperia pro
  6:57h
• Samsung Galaxy Ace Duos S6802
  6:53h
• HTC Radar
  6:53h
• BlackBerry Curve 9380
  6:52h
• Sony Xperia E dual
  6:42h
• Sony Xperia E
  6:40h
• Samsung Galaxy mini 2 S6500
  6:28h
• Samsung I8190 Galaxy S III mini
  6:22h
• Sony Xperia P
  5:58h
• Samsung Galaxy Pocket S5300
  5:54h
• Nokia Lumia 900 AT&T
  5:53h
• Sony Xperia ion LTE
  5:52h
• Nokia 808 PureView
  5:16h
• LG Nitro HD
  5:16h
• BlackBerry Bold 9790
  5:00h
• Pantech Burst
  4:46h

The Mi 4 did better at web browsing too, outlasting the Mi 3 by an hour and a half. With 9 and a half hours, the Xiaomi Mi 4 ranks among the best smartphones we've tested to date.

Web browsing

• Samsung Galaxy S5 mini
  13:14h
• Sony Xperia C
  12:45h
• Nokia Lumia 1520
  12:40h
• Sony Xperia Z1 Compact
  12:37h
• HTC Desire 700 dual sim
  12:30h
• Sony Xperia T2 Ultra
  12:17h
• HTC Desire 816
  11:48h
• Sony Xperia Z2
  11:32h
• LG G2
  11:22h
• HTC One Max
  11:20h
• Sony Xperia ZR
  11:20h
• HTC Butterfly S
  11:07h
• Asus PadFone X
  11:07h
• LG G2 mini
  11:02h
• Nokia Lumia 1320
  10:58h
• BlackBerry Q5
  10:04h
• HTC One (E8)
  10:02h
• HTC One
  9:58h
• Apple iPhone 5s
  9:58h
• Apple iPhone 5
  9:56h
• Samsung Ativ Odyssey I930
  9:54h
• Sony Xperia M2
  9:48h
• Samsung I9190 Galaxy S4 mini
  9:47h
• OnePlus One
  9:46h
• Samsung Galaxy Note 3 Neo
  9:43h
• Alcatel Hero
  9:40h
• Samsung Galaxy Core LTE
  9:37h
• Samsung Galaxy S5
  9:36h
• Xiaomi Mi 4
  9:31h
• LG G Pro 2
  9:31h
• LG G Flex
  9:31h
• Sony Xperia T3
  9:23h
• Samsung Galaxy Tab Pro 10.1 LTE
  9:16h
• Motorola RAZR MAXX
  9:12h
• Samsung Galaxy K zoom
  9:10h
• HTC One (M8)
  9:06h
• Oppo N1
  9:05h
• Samsung Galaxy Grand 2
  9:05h
• Apple iPhone 5c
  9:05h
• Samsung Galaxy Note 3
  9:04h
• Motorola Moto G
  9:04h
• Samsung Galaxy S4 zoom
  8:51h
• Samsung Galaxy Note II N7100
  8:48h
• BlackBerry Q10
  8:42h
• Motorola Moto E Dual SIM
  8:42h
• Motorola Moto E
  8:42h
• Samsung Galaxy Alpha
  8:25h
• Asus PadFone 2
  8:20h
• Nokia Lumia 810
  8:20h
• Huawei Ascend Mate
  8:17h
• Samsung Galaxy Mega 6.3 I9200
  8:17h
• HTC One mini
  8:12h
• Xiaomi Mi 3
  8:04h
• Nokia Lumia 610
  8:01h
• HTC One X+
  7:56h
• Nokia Lumia 630
  7:54h
• Samsung Galaxy Grand Neo
  7:43h
• Motorola DROID RAZR M
  7:42h
• Sony Xperia E dual
  7:42h
• Samsung I8190 Galaxy S III mini
  7:38h
• Nokia Lumia 720
  7:37h
• Samsung I9295 Galaxy S4 Active
  7:35h
• Samsung I9505 Galaxy S4
  7:24h
• Huawei MediaPad 7 Vogue
  7:23h
• Motorola DROID RAZR MAXX
  7:23h
• HTC Radar
  7:17h
• Nokia Lumia 520
  7:15h
• Huawei Ascend P7
  7:13h
• LG Optimus GJ E975W
  7:11h
• Oppo Find 7a
  7:09h
• Samsung Galaxy Grand I9082
  7:09h
• Sony Xperia M
  7:09h
• Meizu MX3
  7:09h
• Samsung Galaxy Express I8730
  7:09h
• Motorola RAZR i XT890
  7:06h
• Sony Xperia J
  7:06h
• Samsung I9500 Galaxy S4
  6:58h
• Apple iPhone 4s
  6:56h
• Samsung P6800 Galaxy Tab 7.7
  6:54h
• Samsung Galaxy Core I8260
  6:54h
• HTC One V
  6:49h
• LG G3
  6:40h
• LG Optimus G Pro E985
  6:40h
• Sony Xperia L
  6:40h
• Samsung Galaxy Premier I9260
  6:40h
• HTC DROID DNA
  6:40h
• Samsung I9105 Galaxy S II Plus
  6:40h
• Motorola ATRIX HD MB886
  6:40h
• BlackBerry Curve 9380
  6:40h
• Sony Xperia E
  6:40h
• HTC First
  6:39h
• Samsung Galaxy Ace 3
  6:38h
• Sony Xperia Z
  6:37h
• Samsung S7710 Galaxy Xcover 2
  6:35h
• HTC Desire 600 dual sim
  6:34h
• HTC One mini 2
  06:33h
• HTC Desire 500
  6:31h
• Huawei Ascend P6
  6:30h
• Samsung I9300 Galaxy S III
  6:27h
• BlackBerry Z10
  6:27h
• HTC Butterfly
  6:24h
• Sony Xperia SP
  6:18h
• Samsung Galaxy S III I747
  6:16h
• HTC One SV
  6:15h
• Samsung Focus S I937
  6:15h
• Nokia Lumia 510
  6:13h
• Sony Xperia ZL
  6:04h
• Samsung Galaxy mini 2 S6500
  6:03h
• Samsung P6200 Galaxy Tab 7.0 Plus
  6:02h
• Oppo R819
  6:01h
• HTC Windows Phone 8X
  6:01h
• Sony Xperia Z1
  5:59h
• Sony Xperia ion LTE
  5:56h
• Samsung Galaxy Fame S6810
  5:55h
• Samsung Rugby Smart I847
  5:53h
• Pantech Burst
  5:51h
• Nokia Lumia 1020
  5:50h
• HTC DROID Incredible 4G LTE
  5:48h
• Samsung Galaxy S Blaze 4G T769
  5:45h
• Nokia Lumia 920
  5:40h
• Nokia Lumia 928
  5:36h
• Samsung S8600 Wave 3
  5:34h
• Pantech Discover
  5:33h
• Oppo Find 5
  5:33h
• Samsung i927 Captivate Glide
  5:33h
• Sony Xperia T
  5:33h
• Samsung I8530 Galaxy Beam
  5:28h
• Nokia Lumia 900
  5:25h
• HTC Desire 616 dual sim
  5:24h
• Samsung Galaxy Note I717
  5:24h
• Sony Xperia Z Ultra
  5:23h
• Samsung Galaxy S Duos S7562
  5:23h
• HTC Sensation XL
  5:20h
• Meizu MX 4-core
  5:19h
• Nokia Lumia Icon
  5:17h
• HTC Desire X
  5:16h
• HTC Rezound
  5:16h
• Sony Xperia acro S
  5:16h
• LG Optimus G E975
  5:15h
• Gionee Elife S5.5
  5:10h
• HTC Rhyme
  5:08h
• Samsung I9103 Galaxy R
  5:07h
• Oppo Find 7
  5:02h
• LG Optimus L9 P760
  5:02h
• Nokia Lumia 930
  4:57h
• Nokia X
  4:55h
• Sony Ericsson Xperia pro
  4:50h
• LG Optimus Vu F100S
  4:49h
• LG Nexus 5
  4:46h
• HTC Vivid
  4:46h
• Samsung Galaxy Ace Duos S6802
  4:45h
• Meizu MX
  4:35h
• LG Nexus 4 E960
  4:34h
• Nokia N9
  4:33h
• Acer CloudMobile S500
  4:32h
• Samsung I9100 Galaxy S II
  4:24h
• Nokia Lumia 820
  4:24h
• Sony Ericsson Xperia neo V
  4:20h
• HTC One X
  4:18h
• Nokia 808 PureView
  4:14h
• LG Optimus 3D Max P720
  4:10h
• Nokia Lumia 900 AT&T
  4:10h
• Nokia Lumia 800
  4:07h
• HTC One S
  4:03h
• HTC One S C2
  4:03h
• BlackBerry Bold 9790
  4:02h
• LG Nitro HD
  4:00h
• LG Optimus 4X HD P880
  3:59h
• Sony Xperia P
  3:59h
• Nokia Lumia 710
  3:51h
• Nokia Lumia 620
  3:50h
• Samsung Galaxy Pocket S5300
  3:47h
• Samsung Galaxy Note N7000
  3:35h
• Huawei Ascend P1
  3:23h
• Samsung Galaxy Nexus I9250
  3:01h

Finally, the Xiaomi Mi 3 had its chance to shine in our video playback test. It did nearly 9 and a half hours before its battery went down to the critical 10%. The Xiaomi Mi 4 managed just 7 hours.

Video playback

• LG G Flex
  19:57h
• Motorola RAZR MAXX
  16:35h
• Motorola DROID RAZR MAXX
  14:17h
• Samsung Galaxy Note 3
  13:32h
• Sony Xperia T2 Ultra
  13:12h
• Samsung I9190 Galaxy S4 mini
  13:12h
• Nokia Lumia 1020
  13:12h
• HTC One Max
  13:11h
• Sony Xperia C
  12:53h
• Samsung Galaxy Premier I9260
  12:51h
• Nokia Lumia 1520
  12:31h
• Samsung I9505 Galaxy S4
  12:30h
• BlackBerry Q5
  12:28h
• Huawei Ascend Mate
  12:18h
• Sony Xperia Z2
  12:16h
• Samsung Galaxy Tab Pro 10.1 LTE
  12:10h
• LG G2
  11:51h
• Samsung Galaxy Note 3 Neo
  11:38h
• Samsung P6800 Galaxy Tab 7.7
  11:37h
• Samsung I9500 Galaxy S4
  11:29h
• Samsung Galaxy Note II N7100
  11:27h
• OnePlus One
  11:23h
• HTC One (E8)
  11:16h
• Oppo N1
  11:15h
• BlackBerry Q10
  11:15h
• HTC One (M8)
  11:14h
• Samsung Galaxy S5
  11:05h
• Samsung Galaxy S5 mini
  11:02h
• Asus PadFone X
  11:01h
• HTC Desire 816
  10:34h
• Apple iPhone 5s
  10:31h
• LG G2 mini
  10:23h
• Apple iPhone 5
  10:12h
• Samsung Galaxy K zoom
  10:08h
• Sony Xperia M2
  10:04h
• HTC First
  10:03h
• HTC One
  10:02h
• Sony Xperia Z1 Compact
  10:01h
• Samsung Galaxy Express I8730
  10:00h
• Samsung I9105 Galaxy S II Plus
  10:00h
• LG G3
  9:57h
• Sony Xperia T3
  9:56h
• Nokia 808 PureView
  9:53h
• Alcatel Hero
  9:49h
• Sony Xperia M
  9:49h
• Samsung I8530 Galaxy Beam
  9:42h
• Samsung Rugby Smart I847
  9:34h
• Samsung Galaxy S4 zoom
  9:30h
• Xiaomi Mi 3
  9:28h
• HTC One S
  9:28h
• HTC One S C2
  9:28h
• Samsung I9300 Galaxy S III
  9:27h
• Apple iPhone 4s
  9:24h
• Samsung Galaxy mini 2 S6500
  9:22h
• Oppo Find 7a
  9:19h
• Nokia Lumia 1320
  9:17h
• HTC Butterfly S
  9:03h
• Motorola DROID RAZR M
  9:00h
• Sony Xperia E
  9:00h
• Samsung Ativ Odyssey I930
  8:59h
• Sony Xperia Z Ultra
  8:45h
• BlackBerry Z10
  8:44h
• Samsung Galaxy Grand 2
  8:41h
• LG Optimus G Pro E985
  8:40h
• Nokia N9
  8:40h
• Samsung Galaxy Mega 6.3 I9200
  8:34h
• HTC Butterfly
  8:28h
• Samsung Galaxy Note N7000
  8:25h
• LG Optimus GJ E975W
  8:15h
• Samsung Galaxy S III I747
  8:14h
• HTC One X+
  8:11h
• Samsung Galaxy Grand I9082
  8:11h
• Motorola RAZR i XT890
  8:11h
• Sony Xperia J
  8:11h
• Huawei Ascend P7
  8:10h
• Samsung Galaxy Alpha
  8:05h
• Samsung I9100 Galaxy S II
  8:00h
• Samsung Focus S I937
  7:55h
• Samsung S8600 Wave 3
  7:52h
• HTC Desire 500
  7:50h
• Samsung I8190 Galaxy S III mini
  7:46h
• Sony Ericsson Xperia neo V
  7:45h
• Apple iPhone 5c
  7:41h
• Asus PadFone 2
  7:38h
• Huawei Ascend P1
  7:38h
• Nokia Lumia Icon
  7:34h
• Samsung Galaxy S Blaze 4G T769
  7:33h
• Sony Xperia ZR
  7:30h
• Samsung Galaxy Core I8260
  7:30h
• HTC DROID DNA
  7:30h
• Samsung S7710 Galaxy Xcover 2
  7:30h
• Samsung Galaxy Note I717
  7:30h
• Sony Xperia SP
  7:27h
• HTC One mini
  7:23h
• Nokia Lumia 610
  7:23h
• LG Optimus G E975
  7:16h
• Nokia Lumia 630
  7:06h
• Samsung I9295 Galaxy S4 Active
  7:03h
• Xiaomi Mi 4
  7:00h
• Samsung Galaxy Grand Neo
  6:55h
• Huawei Ascend P6
  6:55h
• HTC One SV
  6:55h
• Pantech Discover
  6:55h
• Samsung Galaxy Ace 3
  6:54h
• Nokia Lumia 928
  6:54h
• HTC DROID Incredible 4G LTE
  6:51h
• HTC Desire 600 dual sim
  6:49h
• Nokia Lumia 720
  6:43h
• Huawei MediaPad 7 Vogue
  6:40h
• Motorola Moto G
  6:37h
• Nokia Lumia 900
  6:37h
• Meizu MX 4-core
  6:33h
• Nokia Lumia 620
  6:32h
• Motorola Moto E Dual SIM
  6:31h
• Motorola Moto E
  6:31h
• Sony Xperia E dual
  6:27h
• HTC Windows Phone 8X
  6:27h
• HTC Desire 700 dual sim
  6:26h
• Nokia Lumia 810
  6:26h
• Samsung Galaxy Ace Duos S6802
  6:25h
• Nokia Lumia 820
  6:25h
• Nokia Lumia 510
  6:23h
• LG Optimus Vu F100S
  6:23h
• Samsung I9103 Galaxy R
  6:21h
• Nokia Lumia 920
  6:19h
• Sony Xperia Z1
  6:12h
• HTC Sensation XL
  6:12h
• Nokia X
  6:10h
• LG Nexus 5
  6:06h
• Samsung Galaxy Pocket S5300
  6:06h
• HTC One mini 2
  06:05h
• Samsung i927 Captivate Glide
  6:04h
• Sony Xperia ion LTE
  6:03h
• Gionee Elife S5.5
  6:02h
• Samsung Galaxy Nexus I9250
  6:02h
• Motorola ATRIX HD MB886
  6:01h
• Sony Xperia T
  6:01h
• HTC Vivid
  6:00h
• Oppo Find 7
  5:58h
• HTC Radar
  5:54h
• Oppo R819
  5:54h
• LG Optimus L9 P760
  5:53h
• Nokia Lumia 800
  5:52h
• Nokia Lumia 520
  5:50h
• LG G Pro 2
  5:49h
• Nokia Lumia 930
  5:48h
• BlackBerry Bold 9790
  5:47h
• HTC One X
  5:45h
• Sony Ericsson Xperia pro
  5:44h
• Sony Xperia Z
  5:39h
• Meizu MX3
  5:38h
• Pantech Burst
  5:38h
• HTC Desire X
  5:38h
• Sony Xperia acro S
  5:38h
• Samsung Galaxy Core LTE
  5:34h
• Sony Xperia ZL
  5:28h
• Meizu MX
  5:27h
• HTC Rhyme
  5:23h
• HTC One V
  5:20h
• Oppo Find 5
  5:18h
• Acer CloudMobile S500
  5:18h
• Nokia Lumia 900 AT&T
  5:18h
• Samsung P6200 Galaxy Tab 7.0 Plus
  5:16h
• HTC Desire 616 dual sim
  5:15h
• BlackBerry Curve 9380
  5:09h
• HTC Rezound
  5:03h
• Samsung Galaxy Fame S6810
  5:02h
• LG Nexus 4 E960
  4:55h
• Sony Xperia L
  4:44h
• Samsung Galaxy S Duos S7562
  4:30h
• Sony Xperia P
  4:30h
• LG Nitro HD
  4:17h
• LG Optimus 4X HD P880
  4:14h
• LG Optimus 3D Max P720
  3:28h
• Nokia Lumia 710
  3:27h

It was pretty much a tied game in terms of standby, the Xiaomi Mi 4 getting a couple of hours' worth of an edge.

Overall, both phones got an overall battery rating that's just a few hours short of three days in our custom test case involving an hour each of 3G calls, web browsing and video playback a day.

Winner: Xiaomi Mi 4, but just. The difference in overall rating may as well be disregarded but the Mi 4 bagged wins in three out of the four individual tests.