4S 30A lithium battery protection board with multiple components and connection terminals on green PCB

4S 30A 18650 Lithium Battery Protection Board 14.8V/16V with Cable

SKU NA541

$6.99 USD Shipping & tax calculated at checkout
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4S 30A 18650 lithium BMS protection board for 14.8V/16V 4-cell Li-ion packs with cable, with overcharge, over-discharge, overcurrent and short-circuit protection for robotics, LED and DIY backup power.

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Overview

Product Overview

A 4S 30A lithium battery protection board for 18650 pack builds, this battery management module safeguards 14.8V/16V four-cell lithium battery packs during charging and discharging. Designed for DIY battery packs, robotics, portable power, LED systems, and backup energy projects, it helps manage pack safety with protection against common battery faults such as overcharge, over-discharge, overcurrent, and short circuit conditions. The included cable simplifies wiring, making this 4S BMS a practical choice for custom Li-ion packs that need reliable current handling and everyday protection in hobby and repair applications.

Questions & answers

Frequently asked questions

This board is intended for four-cell series lithium battery packs built from 18650 cells. It is not an Arduino module by itself, but it can power projects that need a protected 14.8V/16V battery pack.
The module includes a cable and is sold as a pre-soldered part, which helps simplify installation compared with bare boards. You still need to wire it correctly to the battery pack and load according to a 4S BMS wiring diagram.
It is specified for 4S lithium packs rated 14.8V/16V and a 30A current rating. It provides protection functions for overcharge, over-discharge, overcurrent, and short circuit conditions during charging and discharging.
This 4S 30A protection board fits DIY 18650 battery packs for robotics, portable power, LED systems, backup energy projects, and hobby repairs. It is useful when a custom lithium pack needs basic safety protection under everyday loads.
No. This is a battery protection board, not a standalone lithium charger. Use a charger appropriate for a four-cell lithium pack, and do not assume balancing is included unless it is confirmed in the specific wiring or board documentation.

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What's included

Features & Specs

4S Battery SupportDesigned for 4S 18650 lithium battery packs in series.

Voltage RangeSupports 14.8V/16V four-cell lithium battery pack builds.

30A Current RatingHandles battery pack applications rated up to 30A.

Protection FunctionsProvides overcharge, over-discharge, overcurrent, and short circuit protection.

Charge Discharge SafetyHelps protect the pack during both charging and discharging.

DIY Project UseSuitable for DIY battery packs, robotics, portable power, LED systems, and backup energy projects.

Included CableIncludes a cable for simpler wiring in custom Li-ion pack installations.

Learn

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4S 18650 BMS: Build a Repairable Battery Pack

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