dorrington, wow thanks man, you are so helpful, i really appreciate all your great experience.. and hard typing
So, i think i should replace these 12 cells, they do charge up after a 2-3 hour charge, from .25v to 1.8v, but the voltage drops very fast after disconnecting charger.
I saw you mentioned
"lifepo4 cells from alarmhookup on fleabay".
Im sorry Im not clear on exactly which rating to get,
is it 3.2V 1500mAh ?
Would this be the one's to get?
they are LiFePO4 18650 3.2V 1500mAh
https://www.ebay.com/itm/352610893740
Cheers man!