1S 3.7V 3A 2MOS BMS lithium-ion 18650 battery protection circuit board with metal tabs

1S 3.7V 3A 2MOS BMS Li-ion 18650 Battery Protection Board

SKU NA645

$3.99 USD Shipping & tax calculated at checkout
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1S 3.7V 3A 2MOS BMS battery protection board for Li-ion, LiPo, and 18650 cells, managing charge/discharge safety for DIY power banks, robotics, IoT nodes, wearables, and prototyping.

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Overview

Product Overview

1S lithium battery protection board for 3.7V Li-ion/18650 cells, this 3A 2MOS BMS module manages charge and discharge on a single-cell pack and helps safeguard portable electronics from common battery faults in DIY power systems. Designed for one 18650 or equivalent 1S Li-ion/LiPo battery, it is a compact choice for battery packs, USB-powered gadgets, small robots, IoT nodes, LED projects, and general prototyping where stable cell protection is needed. The battery management board is well suited for custom power banks, embedded devices, and rechargeable builds using Arduino, ESP32, or Raspberry Pi-based hardware.

Questions & answers

Frequently asked questions

This protection board is intended for one 3.7V single-cell Li-ion battery, including an 18650 or equivalent 1S Li-ion/LiPo cell. It can support Arduino, ESP32, or Raspberry Pi-based builds when used as part of a suitable portable power design.
No programming or firmware setup is required. The board is a hardware battery protection module, so installation mainly involves wiring it correctly into a single-cell battery pack and the device’s power path.
This is a 1S protection board for a nominal 3.7V lithium cell and is rated for 3A operation. It is for single-cell packs only, not 2S or higher-voltage battery packs.
It is suitable for compact rechargeable projects such as small robots, IoT nodes, LED projects, USB-powered gadgets, custom power banks, and embedded prototypes. It helps add cell protection to DIY portable electronics using one lithium cell.
This board helps protect a lithium cell during charge and discharge, but it is not a complete charger or power supply by itself. Use it with a compatible 1S lithium charging circuit and a load within the board’s rating.

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What's included

Features & Specs

1S Battery SupportSupports one 3.7V single-cell Li-ion, LiPo, or 18650 battery pack.

3A BMS RatingHandles up to 3A charge and discharge management for 1S battery builds.

2MOS Protection BoardUses a 2MOS BMS design for single-cell battery protection in compact devices.

Charge Discharge ControlManages battery charging and load discharge to help reduce common cell faults.

Project CompatibilitySuitable for rechargeable power systems used with Arduino, ESP32, and Raspberry Pi hardware.

DIY Power UsesWorks well in power banks, IoT nodes, LED projects, small robots, and portable electronics.

Reference

Documents

Datasheet - 1S BMS Protection Board

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