10-Pack 1S 3.7V 3A Li-ion BMS PCM Battery Protection Boards
10-Pack 1S 3.7V 3A Li-ion BMS PCM Battery Protection Boards
10-Pack 1S 3.7V 3A Li-ion BMS PCM Battery Protection Boards for 18650 Cells
Keep your single-cell lithium-ion batteries running safely and efficiently with this 10-pack of 1S 3.7V 3A Battery Management System (BMS) protection boards. Designed for 18650 and similar li-ion cells, each compact PCM board delivers high-accuracy voltage monitoring, three-stage over-current detection, and MOS transistor-controlled charge/discharge management — all in one reliable circuit.
Whether you're building a DIY power bank, repairing a flashlight, or prototyping electronics, these BMS boards are an essential safeguard for your lithium battery projects. Made in Mainland China.
Key Features
- High-Accuracy Voltage Detection: Precisely monitors cell voltage to prevent overcharging and over-discharging.
- High-Voltage Charger Terminal: Compatible with standard li-ion charger inputs using a high-voltage rated terminal.
- Three-Stage Over-Current Detection: Built-in protection covers over-current level 1, over-current level 2, and load short-circuit events.
- MOS Transistor Control: Intelligently manages both charging and discharging cycles for extended battery life.
- Pack of 10: Great value — stock up for multiple builds or repairs.
Technical Specifications
- Configuration: 1S (Single Series Cell)
- Nominal Voltage: 3.7V
- Overcharge Protection Voltage: 4.25 ± 0.05V
- Overcharge Release Voltage: 4.23 ± 0.05V
- Over-Discharge Protection Voltage: 2.54 ± 0.1V
- Max Continuous Charging Current: 2A
- Over-Current Protection: 3A
- Compatible Batteries: 18650 li-ion / lithium-ion cells
- Quantity: 10 pieces per pack
- Battery Included: No
- Country of Origin: Mainland China
What's in the Box?
- 10 × 1S 3.7V 3A BMS PCM Battery Protection Boards
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Learn more: EPA guidance on lithium-ion battery handling
Frequently Asked Questions
Q: What type of batteries are these BMS protection boards compatible with?
A: These 1S 3.7V BMS PCM boards are designed for single-cell 18650 lithium-ion (li-ion) batteries and similar 3.7V lithium cells used in DIY electronics, flashlights, power banks, and more.
Q: Does the BMS board include a cell balancing function?
A: No — these boards are designed for single-series (1S) configurations and do not include a balancing function, as balancing is only needed for multi-cell (2S+) packs.
Q: What protections do these boards provide?
A: Each board provides overcharge protection (triggers at 4.25V), over-discharge protection (triggers at 2.54V), and a three-stage over-current detection system covering over-current level 1, over-current level 2, and load short-circuit scenarios.
Q: How many boards are included in the pack?
A: You receive 10 individual BMS PCM protection boards per order — ideal for bulk DIY projects, repairs, or restocking your electronics workbench.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.