Review on ⚡️ Battery Charge Controller with Digital Display & Protection Switch - 12V, 24V, 36V, 48V Battery by Robert Larris

Bought to monitor some LiFePO batteries. I have a slightly different version that works the same but on a larger PCB with a smaller and lower rated relay. Voltage readings are accurate, but not accurate. It rounds 10 mV to 100 mV. This can cause premature disconnection from some chargers. I suspect it might make more sense to keep LiFePO batteries at 60-70% with this, but that's difficult with LiFePO batteries. Left button - RUN or supply voltage. The button on the right is STOP or Off Voltage. The instructions are in English and mostly understandable, but the RUN/STOP buttons are labeled with Chinese characters. Knowing how it worked, I played around with it to find out. Input and battery labels are marked as OK. It draws about 0.010A at rest and 0.135A when the relay is active. Terminal connections are small. Too small for a 30A board. I had a hard time getting the 12 AWG wire into the screw terminals. Size 8-10 pin spade lugs are 2 sizes larger. There is no conformal coating on the PCB. In general it works as I expected. I'm not too happy with bad markings and small terminals.