[Q] N5; Battery (Maybe) Completely Fried? Diagnostic help appreciated.

Hi guys,

So my sister had her N5 for about a year, and she used the battery a lot, and ran it down fairly frequently. She started saying that her battery wasn't working very well, and that the capacity was very bad. Then she said that the phone would randomly crash. She started having it constantly plugged into a portable charger, and said it would sometimes STILL randomly crash while connected (This could have been the cable though, pretty impossible to test at this point in this state).

Fast forward now I got a free N5 (Same one...) with a bad battery? How can I know it's the battery? It crashes within a minutes or so, not hot or anything like that. I can't get a cycle down for calibration cause it just shuts off. I've charged it off for two days straight.

When it crashes/shuts down while booting up, it needs to reoptimize the apps which takes quite a while.

Is there any way I can fix this? Get a new battery? How hard is replacing the battery? Do you think it's a bad idea to attempt a root?

Thanks guys.

noob, search fried

ok, i know this info is on here, and im not totally illiterate to this stuff. have found and flashed roms in past. im fried tho after two days of digging. so...i have a couple questions.

sgh-i747 U.S. ATT version. locked but using straight talk 4glte sim. 4.4.2. but still on the NE4 baseband. i wanted to update to the nj1 to test the modem and see if i could get a little better reception at home. some have stated its a pretty good increase. depends on where you live, i get that. but where i live im lucky if i get 4g. usually edge 3g. yes my apn is correct. where the heck is the zip download so i can flash without using computer? cannot find nj1 anywhere. not even for pc. i would love a working link that i can download to phone and flash via clockwork or twrp. obviously i missed something so please spare me the burns. the headache i have from 12 hours of digging is pain enough.

also ran into a head scratcher. downloaded root checker basic, in prep for rooting, and had it check, even tho i had not rooted at all yet. and..somehow my phone is rooted? or so it says. how the heck is that? did a full cache wipe and factory reset from recovery mode last night, and have not even attempted root yet. phone bought used but got from original owner who has no idea what root is. i called them to ask. ideas?

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