Review on ⚡️ Anmbest 4S 16.8V 40A Li-ion Battery Charger PCB BMS Protection Board with Balancer for Drill Motor by Andrea Ellis

Full test load 43 amps continuous and holds up like a champ I added a heatsink to the mosfets to keep the temps in check. I will be buying more of these batteries for my other battery builds. The battery I made is a 4S 10P 18650. If you want to run the battery at this high current, you need to connect the wires appropriately to reduce heat from the branches that connect to the batteries. and the output also recommends 10 AWG wire for less voltage drop and less heat. You can use the little tabs on the output to solder the 10AWG wire in place, just make them long enough for the wire to solder, then pinch them off to prevent a short circuit. The solder pads on the power output are big enough to fit an 8mm wide tab but in my opinion to solder a 10 AWG wire directly to the board. You keep the tabs short, there shouldn't be any heat issues at high amperage.