Hello. I have a Dell Latitude 13 laptop with a Li-Polymer battery rated at 11.1V and a capacity of 30WH. Its a T1G6P. I purchased this battery about 3 months back (OEM Dell original).
Anyway what happened was, I left the computer in a bag for probably about 2 or 3 weeks as I was not using it because I got a new one. I wanted to put the Windows 10 preview stuff on this computer so I plugged it in assuming that it was dead anyway. I have not upgraded the OS yet. I backed up whatever data I needed and then noticed the battery icon for the percentage hadn't moved. It did say 13% and has since moved to 11%. Windows says plugged in but not charging. I figured it was the charger so I connected the charger of another dell laptop (same wattage and everything else) and still no charge. When the computer is disconnected, it dies after about 2 or 3 seconds. I have reconnected the battery and check all other connections. I have the computer open to the BIOS under power and it says the condition is normal and still at 11%. I will leave it like this for a while and hope for the best. Do you think that the battery is done for?