The LG Nexus 5X comes with Doze, the new Android feature that promises to extend standby time by being smart about when it lets apps run in the background. To be fair, the old Nexus 5 will get the same feature after the update, but its replacement has two hardware improvements that software updates can't make up for.
The first is the bigger battery - 2,700mAh - and the second is the newer chipset, Snapdragon 808, built on a 20nm process instead of the 28nm process used for the Snapdragon 800.
The new Nexus 5X significantly improves the talk time over its predecessor and indeed posts and above average of 17 hours. We've seen much better performance, the Moto X Style (S808, 3,000mAh) went over 22 hours, and worse - the LG G4 (S808, 3,000mAh) couldn't quite make it to 17 hours.
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Talk time
Oppo R7 Plus
30:46h
OnePlus 2
30:29h
Samsung Galaxy S6 edge+
30:29h
Motorola DROID Turbo
30:09h
Microsoft Lumia 640 XL Dual SIM
29:46h
Microsoft Lumia 640 XL
29:46h
Microsoft Lumia 640 XL LTE Dual SIM
29:46h
Microsoft Lumia 640 XL LTE
29:46h
Samsung Galaxy Note5
28:34h
Sony Xperia Z4 Tablet LTE
28:25h
Sony Xperia Z5 Compact
28:23h
Samsung Galaxy S6 active
26:29h
Motorola Moto X Play
26:28h
Samsung Galaxy A7 Duos
25:12h
Samsung Galaxy A8 Duos
25:02h
Samsung Galaxy A8
25:02h
Apple iPhone 6 Plus
23:49h
LG AKA
23:20h
Meizu PRO 5
23:10h
Microsoft Lumia 640 LTE
23:09h
Microsoft Lumia 640 Dual SIM
23:09h
Microsoft Lumia 640 LTE Dual SIM
23:09h
Oppo R7
22:58h
Motorola Moto E (2nd gen)
22:36h
Motorola Moto X Style
22:23h
ZTE Nubia Z9
22:20h
Lenovo ZUK Z1
22:13h
Meizu MX4 Pro
22:09h
Yota YotaPhone 2
22:09h
Xiaomi Mi 4i
21:02h
Meizu m2 note
20:55h
HTC One M9
20:44h
Asus Zenfone Selfie ZD551KL
20:22h
Samsung Galaxy E7
20:04h
Samsung Galaxy A3
20:04h
Samsung Galaxy A3 Duos
20:04h
Samsung Galaxy S6 edge
19:48h
Samsung Galaxy S6
19:48h
HTC Desire Eye
19:11h
Samsung Galaxy J7
18:37h
Xiaomi Mi 4c
18:31h
Huawei P8lite ALE-L04
18:25h
Samsung Galaxy A5 Duos
18:02h
Samsung Galaxy A5
18:02h
LG G Flex2
17:51h
Huawei P8lite
17:38h
vivo X5Max
17:23h
Sony Xperia Z5
17:13h
Lenovo K3 Note
17:13h
Xiaomi Redmi Note 2
17:09h
LG Nexus 5X
16:57h
Acer Liquid Jade S
16:51h
LG V10
16:40h
LG G4
16:40h
Sony Xperia Z3 Compact
16:40h
Sony Xperia M2 Aqua
16:39h
Motorola Moto E
16:38h
Meizu MX4
16:25h
Sony Xperia Z3+
16:13h
Apple iPhone 6s Plus
15:51h
Microsoft Lumia 435
15:50h
Microsoft Lumia 435 Dual SIM
15:50h
Asus Zenfone 2 ZE551ML
15:47h
Asus Zenfone 2 Deluxe ZE551ML
15:47h
Archos 50 Diamond
15:23h
ZTE Blade S6
15:01h
Nokia Lumia 830
14:56h
Sony Xperia C5 Ultra Dual
14:53h
Sony Xperia C5 Ultra
14:53h
Meizu m1 note
14:53h
Xiaomi Redmi 1S
14:51h
Motorola Moto X (2nd Gen)
14:45h
Huawei Honor 7
14:33h
Xiaomi Mi Note
14:31h
Sony Xperia E3
14:28h
Microsoft Lumia 532
14:24h
Microsoft Lumia 532 Dual SIM
14:24h
HTC Desire 820 dual sim
14:17h
HTC Desire 820
14:17h
Oppo N3
14:14h
HTC Desire 510
14:06h
Huawei Mate S
13:53h
Huawei P8
13:50h
Samsung Galaxy Alpha
13:20h
Meizu MX5
13:15h
Sony Xperia C4 Dual
13:11h
Xiaomi Redmi 2
12:33h
Oppo R1x
12:33h
Lenovo Vibe X2
12:30h
Apple iPhone 6
12:23h
Microsoft Lumia 535 Dual SIM
12:15h
HTC One E9+
12:07h
BlackBerry Leap
12:05h
Motorola Moto G (2nd gen)
11:49h
HTC One A9
11:12h
Sony Xperia E4
11:07h
...