How to determine my lithium battery amp hour rating

[rbell944]

I recently purchased a 2020 RXV Elite lithium with oem Samsung battery. I’m doing some work to it and installing an aftermarket battery meter with shunt. In order to program this I need to know my battery’s amp hours. I have looked online for manuals and messaged a few people directly that I know and can’t seem to find an answer. There is no sticker on the outside case of my battery. Can someone advise where or how I could find this information?

[TheCartBoy]

Could just buy the factory display gauge that's works with the BMS.

https://www.shopezgo.com/10019477

[TheCartBoy]

The amp hour capacity depends on how many cell modules you have. Each is 25.68 Ah.

[rbell944]

Do I need to remove the battery cover to determine? Sorry, my first lithium cart. Still learning. If so is there a guide on how to do this?

[Capt. Lenny]

You could buy one of the cheap battery capacity testers off of Amazon or Ebay, they’re only about $35. Watch Will Prowse’s YouTube video.

[rbell944]

I already have what I want to use. I just need to know how many amp hours my battery is.

Edit: I misunderstood, I see you were offering me to find a battery tester. I guess I might have to go that route if I can’t determine this now. I was just hoping to get all this finished tonight.

[TheCartBoy]

Originally Posted by rbell944

Do I need to remove the battery cover to determine? Sorry, my first lithium cart. Still learning. If so is there a guide on how to do this?

Remove the cover or just look from the sides different angles. A base model RXV is two cell modules, but could be optioned up to four. I put a photo of what they look like under the cover.

[rbell944]

I believe it has these security screws. I’ll need to try in the morning. Here’s what I have.

[Pat911]

Originally Posted by rbell944

I already have what I want to use. I just need to know how many amp hours my battery is.

Edit: I misunderstood, I see you were offering me to find a battery tester. I guess I might have to go that route if I can’t determine this now. I was just hoping to get all this finished tonight.

You have a meter with shunt, that’s pretty much a battery tester.

Set it at 200Ah and run it until dead, watch the meter (remaining Ah) as it counts down. If you end up with say 120Ah left, you know your battery is 80Ah. Watch it closely as it will probably reset to 0Ah remaining when dead.

[rbell944]

Not a bad idea, thank you. I guess I can put the rear end up on stands to do this so I don’t run it dead away from home. I can’t believe it’s not marked anywhere on the cart.