4S 20A 18650 Lithium Battery Protection Board

Overview of this 4S 20A 14.8V Bms 18650 Lithium Battery Protection Board

Introducing roboway 4S 20A 14.8V BMS at the best price in India with Roboway. This  Battery Management System (BMS) made for 4-cell lithium-ion (18650 type) batteries connected in series, which gives a total voltage of 14.8V. It keeps your battery pack safe while charging and discharging by preventing overcharging, over-discharging, and short circuits.

It can handle up to 20A current, making it suitable for medium-power devices like e-bikes, DIY power banks, solar projects, or backup systems. It is automatically cuts off power if there is a short circuit or the current is too high, protecting both the battery and the device. This BMS comes with overcharge protection and stops the battery from charging too much, which increases battery life and avoids damage

Features

Overcharge Protection – It stops charging when the battery is fully charged, so that the cells don’t get damaged or swollen due to extra voltage.

Over-discharge Protection – It cuts off power when the battery voltage goes too low, which helps in avoiding deep discharge and increasing battery life.

Overcurrent Protection – The board automatically disconnects the supply if the current is higher than the safe limit, preventing wires and cells from heating or burning.

Short Circuit Protection – In case of sudden short connection, the BMS quickly shuts down the circuit to save the battery and connected device from damage.

Balanced Charging – It balances the voltage of each cell during charging so that all cells charge equally, improving battery performance and lifespan.

Specification

Model: 4S 20A 14.8V BMS 18650 Battery Board

Battery Type: Lithium-Ion (Li-ion)

Cell Configuration: 4S (Four Cells in Series)

Nominal Voltage: 14.8V

Max Continuous Current: 20A

Max Peak Current: Typically 30A

Overcharge Voltage Protection: 4.2V per cell

Over-discharge Voltage Protection: 3.0V per cell

Short Circuit Protection: Yes

Overcurrent Protection: Yes

Temperature Protection: Yes

Balance Function: Yes

PCB Dimensions: 70mm x 35mm

Connector Type: Wire leads or plug connectors

SKU: RW-735