Does anyone know anything about these batteries? They sound impressive.
"Typically half the weight of lead acid with several times the lifespan, BMI cells and batteries are a superior performing substitute for lead acid batteries. While many of the Chinese cell manufacturers will quote you a life of 1000 cycles, BMI cells have been independantly laboratory tested and proven to have a working life in excess of 8000 cycles.
These cells on offer are rated at 3.3V10Ah. Rated discharge is 200 amps peak (20C) and 120 amps continuous discharge rating (12C). 10Ah is a genuine minimum capacity and independant testing recently showed these cells will measure an actual capacity of more than 10Ah. These cells have M6 threaded terminals so they are easy to bolt together to form battery packs of any voltage or capacity (no need for a battery tab spot welder). Simply bolt them together with copper link bars (available separately) or eye terminals and wire".
A 36 volt 10 Ah pack that I'm thinking would work for me would be like $430.00, would still need a BMS and charger. With the PingPing batteries, I would have to go with the 36 volt 20 Ah pack which would probably be like $600.00 which includes BMS, not sure if he still provides a charger in the deal.