FWIW, maybe this is worth a shot before purchasing new batteries:
I also had issues with the batteries not taking a charge. I also picked up a Nitecore i2 charger. The LEDs would flash when attempting to charge the batteries, which indicates a battery fault; the charge was simply too low for it to activate the charging sequence.
Despite it not being the best practice to charge batteries that have “zero stated,” I placed several batteries in sequence and connected them to one slot in the charger. The voltage was still low, but it was now high enough to activate the charging sequence. I charged them by hand for a minute or two. This got the batteries to the point where they could be used normally in the Nitecore charger, and they later worked as expected in the Reform.