5,595,964 Members 31,319 Now Online
XDA Developers Android and Mobile Development Forum

N7 JB 4.2 strange charging issue

Tip us?
 
dexterslab
Old
#1  
Senior Member - OP
Thanks Meter 4
Posts: 119
Join Date: Mar 2010
Location: Manchester
Default N7 JB 4.2 strange charging issue

My stock unrooted 16gb n7 received the 4.2 update this morning, all has been fine until this evening when it needed charge.

It often gets plugged into a htc phone charger, which has worked fine since i bought the tab a few months ago until today, its a 1amp charger so it takes ages to charge, but thats fine as it is plugged in until the morning normally.

So i plugin as normal, and come back after setting up google play music on my desktop pc, and i see the unit rebooting showing the glowing X. The screen goes blank and is unresponsive, eventually the google logo appears and it boots normally (its still plugged in btw), after unlocking the screen goes mental after maybe 5 seconds with random noise on it, then goes black.

So i unplug and use the genuine asus charger and cable, it does the same twice over, reboot, freeze, long wait then reboot.

I have now left it on charge using the asus charger and it seems to be ok now

Have google changed some charging requirements? Anyone else seen this?

Sent from my Nexus 7 using xda premium
Samsung Galaxy Nexus - ASUS Nexus 7 - HTC HD2
The Following User Says Thank You to dexterslab For This Useful Post: [ Click to Expand ]
 
RusherDude
Old
#2  
Senior Member
Thanks Meter 98
Posts: 382
Join Date: Aug 2012
Not sure, but my nexus 7 on Android 4.2 charges like 35% slower than did with 4.1.2..... what the hell did they do??
The Following User Says Thank You to RusherDude For This Useful Post: [ Click to Expand ]
 
dexterslab
Old
#3  
Senior Member - OP
Thanks Meter 4
Posts: 119
Join Date: Mar 2010
Location: Manchester
Funny you mention that, i might agree with you there

The N7 seems fine today, i did make a couple of videos of it misbehaving last night, watching back my circle battery widget app jumps from 16% to 0% battery just before it goes blank, indicating it might have simply run flat but thought it still had 16% battery?

Wonder if they have changed the battery meter scaling?

I think i will run it flat and check it shuts down properly like it used to

Sent from my Nexus 7 using xda premium
Samsung Galaxy Nexus - ASUS Nexus 7 - HTC HD2
 
jbird92113
Old
#4  
Member
Thanks Meter 2
Posts: 52
Join Date: Oct 2012
Quote:
Originally Posted by dexterslab View Post
Funny you mention that, i might agree with you there

The N7 seems fine today, i did make a couple of videos of it misbehaving last night, watching back my circle battery widget app jumps from 16% to 0% battery just before it goes blank, indicating it might have simply run flat but thought it still had 16% battery?

Wonder if they have changed the battery meter scaling?

I think i will run it flat and check it shuts down properly like it used to

Sent from my Nexus 7 using xda premium
Hi dexterslab,

On a side note when you update to 4.2 were you already rooted and did you have superSU version0.98 installed? I have been reading other posts in this forum that folks have been rooted, superSU installed and the update has completely crashed their N7. ANy info would be greatly appreciated.

Thanks,
JBIRD
The Following User Says Thank You to jbird92113 For This Useful Post: [ Click to Expand ]
 
dexterslab
Old
#5  
Senior Member - OP
Thanks Meter 4
Posts: 119
Join Date: Mar 2010
Location: Manchester
Its still as stock, locked and unrooted

Sent from my Nexus 7 using xda premium
Samsung Galaxy Nexus - ASUS Nexus 7 - HTC HD2
The Following User Says Thank You to dexterslab For This Useful Post: [ Click to Expand ]
 
scubastevegk
Old
#6  
Junior Member
Thanks Meter 3
Posts: 8
Join Date: Aug 2007
I've noticed slower charging since the 4.2 update too - did a quick Google search and landed here. Using the same genuine Asus charger and generic cable that I did before the update, and I would agree with the roughly 35% slower estimate.
The Following User Says Thank You to scubastevegk For This Useful Post: [ Click to Expand ]
 
jbird92113
Old
#7  
Member
Thanks Meter 2
Posts: 52
Join Date: Oct 2012
Quote:
Originally Posted by dexterslab View Post
Its still as stock, locked and unrooted

Sent from my Nexus 7 using xda premium
Thanks, did you do a factory reset prior to updating?
 
dexterslab
Old
#8  
Senior Member - OP
Thanks Meter 4
Posts: 119
Join Date: Mar 2010
Location: Manchester
No, update received ota so just installed it

Sent from my Nexus 7 using xda premium
Samsung Galaxy Nexus - ASUS Nexus 7 - HTC HD2
 
dexterslab
Old
#9  
Senior Member - OP
Thanks Meter 4
Posts: 119
Join Date: Mar 2010
Location: Manchester
Been working and charging fine since, guess it was just a random glitch!?

Sent from my Nexus 7 using xda premium
Samsung Galaxy Nexus - ASUS Nexus 7 - HTC HD2
 
Guhrasoh
Old
#10  
Member
Thanks Meter 19
Posts: 81
Join Date: Jul 2011
Quote:
Originally Posted by scubastevegk View Post
I've noticed slower charging since the 4.2 update too - did a quick Google search and landed here. Using the same genuine Asus charger and generic cable that I did before the update, and I would agree with the roughly 35% slower estimate.
Are you using the new Daydream feature (you can find it in the display settings). If yes this may be the cause of slower charging, because it doesn't turn of the display.
SE Xperia X8 | GingerDX | AX8MT | Xperia Active Launcher
SE Xperia NEO everything on stock rooted with zergRush.
Nexus 7 C9O on stock 4.2.
Xperia Z on stock and rooted, bootloader still locked.

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes