I just received two XL Lite bikes, and I'd like to charge them using a better charger than the included 2A chargers. I already have a Grin Technologies Cycle Satiator programmable charger, and I'd like to know what the max charge amperage the BMS can handle in the 48V 7.8AH battery pack. 3A? 4A? I'll rarely be charging above 80% capacity. Thanks!