u/Professional-Dog-441

As the title says, im planning on buying the revv1 fs, I notice they dont sell the battery balancer thing i need to double that battery life. Can anyone link a good one from amazon?? Im afraid of buying one that'll be cheaply made and or mess up my bike. Thank you

Edit: Yes I know i can swap it when the battery is low thats not what im asking. Im just looking for a reliable battery balancer.

So I was looking at the iscooter dx5 and the happyrun g70 pro. I like the fact it has a locking system, and a anti theft type of thing. But I heard the dx5 only hits 28mph and happyrun (which was the one i really wanted) has bad customer service. Can anyone recommend a ebike or something that has the same features??? Thanks :)