👉What Is Lithium-Ion Battery?
A lithium-ion battery or Li-ion battery is a type of rechargeable battery composed of cells in which lithium ions move from the negative electrode through an electrolyte to the positive electrode during discharge and back when charging

👉What does 3S stand for battery?
Voltage / Cell Count

This is sometimes why you will hear people talk about a "2S" battery pack - it means that there are 2 cells in Series. So a two-cell (2S) pack is 7.4V, a three-cell (3S) pack is 11.1V, and so on.

👉About 3S BMS

Number of cells in series: 3

Maximum rated charge/discharge current: 25 A

Charging voltage: 12.6 V

Balance current: 50 mA

Operating temperature: -4ºF to 122ºF (-20ºC to +50ºC)

Board dimensions: 1.75″ x 2.25″ x 0.2″ (4.5 cm x 5.6 cm x 0.4 cm)

Note: this BMS is designed for lithium-ion

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