Smart 4S BMS 12V 250A with WiFi Module and CAN 485 Communication Protection Board for Li-ion Lithium Battery Pack(Li-ion 4S 12V，250A)

It's a Daly BMS.cant expect anything less. Easy to install,great price built quality is great

It might work for some people, possible it depemds on their phone/pc software. Once I had this connected to a 36volts battery, I was able to read the cells information and charge status. But secomd day the BMS went into sleep and could not wake it up even by pressing the wireless device button, I had to turn on the charger, then for some reason it woke up amd I could read the status on the app. Ballancing is not doing a good job for be. After the full charge and overnight, the cells were still almost 500mv apart, even the Active ballance tab in the app stated that it does ballance at -3000mA at times. I received a number of errors stating that tjis application has a bug and it needs to close. It was annoying to have this restarted, a brand new device. Then I tried to update the app the default passowrd is not working. Went onlime and read a few comments posted by unhappy customers who bricked their Daly BMS during the update. That was 2022. Now I am in Sept2025, ai assumed that was resolved. But these app bugs makes me return the product. Otherwise it looks good and solid made...in China.

BMS for my 14 cell 58.8 V battery storage

Note: these tell you more or less everything about your battery, but I find that I need to regularly charge the battery whether I ride the bike or not.

Needed a way to tell the strength of charge for the battery i built. This did the job