Thanks all for your suggestions!
Gary_in_NJ wrote on 04/03/22 at 13:58:18: That is why you should not use a Lithium Starting Battery without a BMS (battery management system). The BMS will protect the cells from over depletion and will manage the charging of the battery to be sure it is in balance. A BMS is well worth the extra $20-$40.
Are there particular brands that have a BMS internal to the battery? Or do I always need to buy a separate one and install it when converting? If the latter, is there anything I should know before buying them separately, or is a BMS pretty much a universal fit? (I admitedly have not googled this question yet, but I'm about to)
Also, I've push started my bike 5 times in the past week! The trick is to get it moving then jump up and drop down on the seat when you release the clutch. I'm about 180lbs, and I can do it everywhere but a gravel road (found that out the hard way).
Edit: nvm, the antigravity brand recommended by Ohio has an internal BMS. Thanks again all