Dumbass... where did you get that battery case? Did you build it? Out of what?

We're in the process of trying to create a LiFePo4 upgrade pack at our shop. But we can't find a pack that fits in the standard Currie battery case. Apparently, it needs to be at least 15AH, otherwise the stock controller / 450w motor will draw too many amps and the BMS will cut power. So a 10AH or 12AH won't work...

Have you had any issues with the BMS cutting out at 20AH? Still trying to figure out the optimal battery size... then we need to come up with a battery case...