1S 10A BMS Protection Board (3.7V Li-ion / Li-Po)

Overview

This 1S 10A Protection Board is a high-current Battery Management System (BMS) built for single-cell (1S) 3.7V ternary polymer lithium-ion batteries. Engineered for high-drain devices, it delivers a steady 10A continuous discharge and withstands peak surges up to 25A — an excellent choice for DIY power banks, portable electronics, and small motorized projects. Integrated high-precision voltage detection and current-sensing circuits guard the cell against overcharge, deep discharge, and short-circuit. Its ultra-compact design and low-resistance MOS tubes minimize power loss and heat, keeping your battery healthy and efficient over time. Clearly labeled B+/B− and P+/P− terminals make wiring for charging and load connections quick and secure.

Specifications

Parameter Value

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Type 1S Li-ion / Li-Po BMS protection board

Cell configuration Single cell (1S) 3.7V

Battery chemistry Ternary polymer lithium-ion (Li-ion/LiPo)

Continuous discharge current 10A

Peak / surge current 25A (instantaneous)

Overcharge protection 4.25 – 4.35V (typ. 4.28V)

Overcharge release ~4.10V

Over-discharge protection 2.40 – 2.50V

Over-discharge release ~3.00V

Short-circuit protection Yes (auto-recovery on load removal)

MOS internal resistance Low (low-RDS(on))

Battery terminals B+ / B−

Load & charge terminals P+ / P−

Operating temperature −40°C to +50°C

Board dimensions [confirm from physical unit]

Net weight [confirm from physical unit]

Key Features

• 25A peak surge support — handles high startup current for small motors and power-hungry modules.

• 1S 3.7V optimization — precision-tuned for standard ternary polymer lithium chemistries.

• Advanced protection suite — automatic cut-offs for overcharge, over-discharge, and short-circuit.

• Heavy-duty 10A output — consistent power delivery in high-drain applications.

• Compact PCB design — fits tight battery enclosures and portable devices.

Applications

DIY power banks, portable electronics, small motors and motorized projects, LED lighting, handheld tools, robotics and educational kits, and any single-cell 3.7V build needing reliable protection.

Wiring (quick reference)

• B+ / B− → connect to the battery's positive and negative.

• P+ / P− → connect to the load and to the charger.

• Charge and discharge both pass through the P+ / P− terminals.

FAQ

• Can I use it with an 18650 cell? Yes — any single-cell 3.7V Li-ion/LiPo cell, including 18650.

• Does it balance cells? No — this is a 1S board; balancing only applies to multi-cell packs.

• Is the 10A rating continuous? Yes, 10A continuous with 25A momentary surge capability.

• Does short-circuit protection reset itself? Yes, it recovers automatically once the short/load is removed.