3S 20A 12.6V 18650 Li-ion Lithium Battery Protection BMS Board with Balance | Drill & Power Pack Module

The 3S 20A Lithium Battery Protection Board (BMS) is a reliable solution for managing 3-cell Li-ion or LiPo battery packs. It ensures stable charging and discharging while preventing damage from overvoltage, undervoltage, or overcurrent conditions. Available in both enhanced and balanced versions, it is widely used for drills, sprayers, LED drivers, and low-power inverters.

Frequently Asked Questions (FAQs):

Q1: What batteries can this BMS be used with?
It works with 3S packs of 18650, 26650, or polymer lithium batteries, with a nominal voltage of 11.1V and a full charge voltage of 12.6V.

Q2: What’s the difference between the enhanced and balanced versions?

• Enhanced version: For starting currents below 80A and power loads under 130W (no balance function).

• Balanced version: Adds cell balancing, supports power up to 170W, and extends battery life.

Q3: Can I use this for power tools like drills?
Yes, but ensure your batteries are rated properly (15C–20C power cells) for drills. Ordinary 18650 cells may not provide enough current.

Q4: Does it protect against short circuits and reverse polarity?
It includes short-circuit protection and auto recovery, but reverse polarity protection is not included.

Q5: Why is balancing important?
Balancing helps equalize the voltage of each cell in the pack, preventing overcharging or undercharging of individual cells and extending overall pack life.

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🔹 Specification Table