QUICK SPECS:

1. Model: 3SJH25A-C
2. Voltage: 11.1V 12V 12.6V
3. Current: 25A (operating current)
4. Over-current: 75A (overcurrent peak)
5. Working temperature: -30 / + 80
6. Size: 56*45*4.0mm

APPLICATIONS:

1. Small power inverter
2. Massager battery pack
3. LED lamp backup power
4. Electronic products
5. Solar street lamp battery pack
6. Monitoring standby power supply

Application:

Vacuum cleaner,massager battery pack,LED backup power supply,12V li-ion electronics, solar power led, ect

A Battery Management System, or BMS for short, is used to protect your battery during charging and discharging. During charging, the BMS will monitor the voltage of all of your cells and balance the cell groups to ensure they are charged equally. During discharging, the BMS will monitor the voltage of all of the cells, as well as the entire pack voltage and the discharge current. If the BMS determines that any of its preset limits have been passed, such as the battery draining too low or an unsafe amount of current being pulled from the battery, the BMS will cut power to the battery to protect it from damage.

This 3s BMS is fairly easy to install, but will require that you are decent with a soldering iron to add the charge/discharge/balance  wires. You should use fairly heavy gauge wires for the charge/discharge wires, while very small wires can be used for the balance wires as they carry much less current.