I have to replace one of the batteries in my 8 battery 96v system and I am wondering how important it is to get the same brand and model number as the the rest of the batteries in the pack? Can I just match the specs with a different brand/model and be okay? These are AGM batteries.
A little background info: This is my first EV and I just got it driving about one year ago so I am new to this stuff. I have a PakTrakr BMS installed and all seemed to be going well until about three months ago when I got in the car for the first time in about a week and noticed that the PakTrakr display would not turn on. I found that the voltage of the most positive battery in the front pack (the one that the PakTrakr system draws power from) was down to about 5 volts (bad, I know) although the other 7 where fine. I had no time to deal with it at the time so I disconnected the drained battery from the rest of the system and put the car on hold until now. At this point, the drained battery is down to a terminal voltage of about 1v and I believe there is no saving it. If anyone has an idea of why this battery drained so fast I would love to hear it. Thanks.