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May
02
2012

HTC Desire HD power consumption Wednesday, 2 May 2012

After rooting and flashed custom ROM, HTC Desire HD A9191 power consumption has changed dramatically. If, with original ROM, in average use the battery almost managed to hold around 14 hours or around 36 hours in stand-by  with all optimizations that i could do, now with custom rom easily comes to 24 hours for average use and 3 days if mostly on stand-by but with [Background data], [Auto-sync], WIFI and Bluetooth active.

 

Another aspect is WIFI Sleep Policy. As shown in pictures from D series, the best way to extend battery life is to let WIFI Sleep Policy on NEVER. The wireless will never sleep and obviously will drain more power from battery, but lets take a look at power consumption percentages. We have:

  • WIFI Sleep Policy : NEVER … WIFI drains 13% of total, Android OS drains 11% of total battery consumption but in 41 hours
  • WIFI Sleep Policy : After 15min / Never when plugged in … WIFI drains 4% of total, Android OS drains 19% of total battery consumption in 26 hours

Seem like Andoid OS (CPU) drains alot more than WIFI does, so better WIFI On with more power consumption instead of more CPU time that drains way more power to sleep / unsleep WIFI module.

 

HTC claims :

Talk time: up to 550 min (2G) up to 320 min (3G)
Stand-by: up to 490 h (2G) up to 420 h (3G)

 

Real life usage:

Time ON Battery
max – min
(%)
Cell
stand-by
(radio)
Phone
IDLE
Voice
Calls
Display
(backlight)
WIFI Bluetooth Android OS
(CPU / Awake)
Light (A pictures)* 1d 0h 47m 100 – 24 1d 0h 47m

(12%)

1d 0h 47m

(11%)

37m 5s

(29%)

1h 18m 52s

(31%)

6h 55m

(5%)

1d 0h 47m

(2%)

2m 57s / 22m 57s

(8%)

Light (E pictures)** 2d 7h 50m 100 – 22 2d 7h 50m

(14%)

2d 7h 8m

(13%)

28m 26s

(12%)

41m 32s

(9%)

2d 7h 50m

(18%)

2d 7h 50m

(2%)

2m 11s / 36m 16s

(16%)

Medium (C pictures) 1d 2h 12m 100 – 9 1d 2h 12m

(9%)

1d 1h 6m

(8%)

1h 18m

(40%)

1h 5m

(17%)

7h 37m

(4%)

1d 2h 11m

(2%)

3m 21s / 39m 12s

(19%)

Heavy (D pictures) 1d 17h 7m 100 – 3 1d 17h 7m

(10%)

1d 16h 12m

(9%)

1h 43m

(32%)

54m 47s

(11%)

1d 17h 7m

(13%)

1d 17h 7m

(2%)

49s / 43m 18s

(11%)

Stand-by (B pictures) 1d 10h 50m 100 – 54 1d 10h 50m

(37%)

1d 10h 50m

(35%)

0m

(0%)

15m

(14%)

1h 12m

(6%)

1d 10h 50m

(4%)

0m 35s / 3m 23s

(4%)

* Light (A pictures) – WIFI Sleep Policy : After 15min
** Light (E pictures) – WIFI Sleep Policy : NEVER

 

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