So, I have a bit of a head scratcher here.
2005 GEM e4
Has an aftermarket R4F Motor and Rebuilt Controller
In February of 2015, we replaced all 6 original gel cell batteries with 6 new Gel Cel Batteries from Napa (BAT 8272)
GEM ran great and had a lot more pep after this replacement, however then the controller burnt up.
Rebuilt the controller again, and replaced a few of the cables that felt warm to me after running, one on the controller to the motor (the rusted one in the pic), and one on the battery string to the fuse.
GEM ran great again.
Has the original Delta Q charger in it, and we kept it plugged in as much as possible. After the birth of my first son, it was left unplugged for about two months and then returned to the charger.
Wife took it to work the other day, and less than a mile from the house she had poor acceleration, and the yellow turtle came up on the dash despite showing a full battery gauge.
I picked up the car and tried to get it home, but eventually it failed and threw error code 15, showing low battery voltage.
Got it home, and checked the individual batteries. A few were 10v, and most were in the 11-12v range.
Charged the cells individually with an off-board charger and then plugged it back in to charge via the Delta Q.
Next day, took the car off the charger and drove it a short distance and all the same symptoms appeared. Took it back home and checked the batts, again a few were already down to 10v and all were in the 11-12v range.
I used my cheapo battery analyzer and it is saying all but one of the batts are No Good.
Used a different off board charger on “reconditioning mode” let it sit for an hour after charging, and retested. Analyzer still showing the batts are No Good.
The Napa batteries are said to have a 24month warranty, but I am guessing that there is something else going on here. Would appreciate any insight. The last thing I want to do is burn up another set of batteries at over $1.5k!