I got a broken stihl AR3000 battery backpack, i think the only problem was that one of the four wires going to the connector was not properly connected. I do not own any matching stihl power tools, i do have other uses for a 1148Wh 36V battery backpack.
The backpack can be charged with a normal stihl AL 300 or AL 500 charger which i do not have. I did try to connect an 36V charger to the positive and negative terminals of the battery but it will not charge. It would be good to know the pinout of the charger.
I think one of the other two wires is used for charging but unfortunately the bms in the backpack is potted, and i do not want to connect 36V to it without knowing the pinout...
Cells: Sony US18650NC1
Configuration: 10s22p
I've attached some pictures of this thing...