Fast boot battery related questions

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Hi, I've noticed that the phone has fast boot enabled by default,which improves the boot time very much,but I have 2 questions about it:

1) when you shut down the phone, is it completely shutdown like with hibernation on PCs or is it in a sort of standby? I'm asking this because before shutting down the phone battery was on 75 percent left and now, just after the power on it is on 56 percent... I don't know if it is a matter of battery stats not yet calibrated or if battery drains overnight with phone shutdown and fast boot enabled..

2) battery usage stats are not reset upon a phone restart, so I can not see the screen on time related to my second charge, since it continues accounting time since the first boot... Is it again related to fast boot, which does not shut down completely the phone?

Do you leave fast boot enabled? Are there other cons related to it?

This is a very great phone, let's hope firmware 1.28 improves the battery life..

Sent from my HTC One X using Tapatalk

I think it depends on how you use the phone. The only time I turn my phones off is when I want to reset them to clear some software glitch or other, and since that needs a full power off, I disable fast boot. The One X still boots quickly enough without it, considering I don't do it very often.

If I was turning the phone off and back on more frequently, I might leave it enabled. I guess that's down to personal preference and usage patterns.

In terms of what fast boot does, I think it's a low power sleep mode, not full Windows-like hibernation - i.e. there is some slight power drain while the phone is off. In one of the DHD threads recently, someone had significant power drain from a rogue app even while the phone was turned off. When he disabled fast boot, the battery drain went away. This suggested to me that this app was stopping the phone from completely sleeping - but if it had been completely powered down, that wouldn't have happened. I don't know this for a fact, though, it's just a theory based on observations.

Originally Posted by preacher65

In terms of what fast boot does, I think it's a low power sleep mode, not full Windows-like hibernation - i.e. there is some slight power drain while the phone is off. In one of the DHD threads recently, someone had significant power drain from a rogue app even while the phone was turned off. When he disabled fast boot, the battery drain went away. This suggested to me that this app was stopping the phone from completely sleeping - but if it had been completely powered down, that wouldn't have happened. I don't know this for a fact, though, it's just a theory.

I may be in a similar situation, since 15 percent of battery life drain in 8 hours with phone shutdown is definitely too much.. hope firmware 1.28 will help also for this


Sent from my HTC One X using Tapatalk

Originally Posted by Slaytanic

I may be in a similar situation, since 15 percent of battery life drain in 8 hours with phone shutdown is definitely too much.. hope firmware 1.28 will help also for this

Definitely too much - mine loses less than that overnight, and the phone shouldn't use more power when it's turned off than when it's on!

As you say, hopefully updates will fix it.