u/Fit_Recognition_5083

I have 2 radrunner 2's, one of them the battery is not holding charge. When the charger is plugged in, the power light is red and the charge light is green. After hours of charging, it's still just at 1 charge. Upon investigating this, i found it (and the other bike whose battery seems to be working fine) are recalled (RP-1304). Radpower is out of stock, has been for months it seems, and has no time on when they will get new stock. I need this bike. What are options for other batteries?