Opus BT-C3100 v2.2

I have the ISDT N8 and it's pretty good, if you're not in a rush to charge your batteries u can plug them in and it'll drain them then fully charge so u don't develop any sort of memory loss and its only 50 bux. link here

https://www.amazon.com/Display-Universal-ISDT-Rechargeable-Batteries/dp/B07K3RZ18F

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https://www.amazon.com/EBL-Li-ion-Rechargeable-Batteries-Flashlight/dp/B06X9FML74/ref=sr\_1\_3?dchild=1&keywords=aaa+lipo+3.7v&qid=1620951050&sr=8-3