The device randomly reboots itself- it's happened while I was scrolling between pages on the launcher, connecting to a WiFi network, and sometimes even when the device was just sitting on its own.
So far, it's happened on every custom ROM I've tried (Omni, IOKP, IOAP and CM), and even Stock TW flashed via Odin with and without a PIT File.
The duration between reboots is inconsistent, but it's always a full reboot- suddenly back to the Samsung logo and then the ROM logo, beore the system loads up normally.
Probable Causes (my best guesses):
Apps are almost definitely not a cause, because I only install a handful (ES File Explorer, GoldenDict, AnyMemo, Mantano Reader, Skype, Manga Watcher, Opera Browser, MXPlayer, AdAway, Greenify and Helium backup).
***One particular event sticks out to me though: early on when I first got the device, the battery ran out, and I had to leave it as is for 2 weeks, due to some family issues.
1.) How would I go about diagnosing the cause of the random reboots?
2.) Could the extended Battery depletion described above be the cause of my instability issues?
3.) If my current battery is indeed the problem, should I buy a replacement from NewPower99? I am worried that since the Note 10.1 is a 2-year old device, a Li-Ion Battery sitting on a store shelf for such a long duration would be no better than the stock one I have now.
Note: Unfortunately, I waited too long and the tablet is beyond its Warranty Date, so sending it in for repair/replacement is not an option.
Thank you for taking the time to read this. I'd really appreciate any help/advice you can give!