Hi Hamza, I've still to buy a battery like this. Can you share what charger you use and how you connect to your 857? I use power poles so need to convert it. Do you know if that battery has a BMS built it so it would cut off itself? Colin
@@Idahoinsider I have a cable which has XT60 on one side and soldered it to my fused radio power cable. Nothing too fancy. I’m thinking of making some more cables up with power pole so I can borrow someone else’s battery if I need to at a field day