Possible Allied Lithium Install Problem

[Threest20]

Hey all, I installed 2 allied 48v lithium’s into my 2013 ydre last weekend. It seemed to act good at first, I charged them up all the way as soon as put them in. I drove it and it drove fine, I was very happy. I brought it back and put it on the charger. The directions said to charge it after every use. When I took it back out, it ran fine for about a mile then it started acting weird. It’s acting as if the batteries/power keep cutting on and off. I press the gas, nothing, I can here the solenoid click just like before the new batteries were put in. Then all of the sudden it’ll kick on full power for a second or two then cut out. It does this in reverse and forward. Any ideas on what this might be? I checked all the connections to the motor, solenoid, controller, batteries, all seem tight and clean. Everything is stock except the lithium batteries, which is why I only got two. It totals 60Ah. Thanks!