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The 3S 12V 25A 18650 Lithium Battery Protection Board is a high-performance circuit designed to safeguard 3-series lithium-ion battery packs (typically 11.1V nominal, up to 12.6V fully charged). This board offers overcharge, over-discharge, overcurrent, and short circuit protection with an integrated balanced charging circuit to extend battery life and ensure safe operation.
Designed for high-current applications, it supports continuous currents up to 25A and short surge currents up to 50A for half a second. The protection board uses the same port for charging and discharging, simplifying wiring. When balancing, the board may generate slight warmth, which is normal as the cells equalize voltage.
This protection board is intended specifically for lithium-ion batteries such as 18650 cells. It is not suitable for iron-lithium polymer batteries or starter batteries for cars and motorcycles. It is ideal for a wide range of applications including electric drills, small inverters, vacuum massagers, LED lamps, solar street lamps, and other 12V standby power devices.
🔧 Key Features
- Robust 3S 12V 25A Lithium Battery Protection Board with balanced charging
- Protects against overcharge, over-discharge, overcurrent, and short circuits
- Supports continuous 25A discharge and 50A peak (0.5s) current
- Balanced circuit extends battery pack life by voltage equalization
- Compact size with integrated wiring for charging and discharging
- Compatible with 3S 18650 lithium-ion battery packs (11.1V nominal)
- Ideal for power tools, electronics, solar applications, and automation
- Temperature tolerant for typical lithium battery operating ranges
📐 Technical Specifications
| Product Name | 3S 12V 25A 18650 Lithium Battery Protection Board |
| Battery Configuration | 3 Series (3S) Lithium-Ion 18650 Cells |
| Nominal Voltage | 11.1V |
| Maximum Voltage | 12.6V (fully charged) |
| Rated Continuous Current | 25A |
| Maximum Surge Current | 50A (0.5 seconds) |
| Protection Features | Overcharge, Over-discharge, Overcurrent, Short Circuit |
| Balance Charging | Integrated Balanced Circuit |
| Charge/Discharge Port | Same Port for Both Charging and Discharging |
| Operating Temperature Range | -20°C to +60°C |
| Dimensions | Approx. 45mm × 30mm × 5mm |
| Applications | Electric drills, small inverters, LED lamps, solar street lamps, power tools, standby electronics |
📌 Applications
- Battery packs for electric drills and hand tools
- Small power inverters and vacuum massagers
- LED lighting and solar-powered street lamps
- 12V standby power for electronic products
- Battery management in automation and IoT devices
💡 Why Choose This Protection Board?
The 3S 12V 25A 18650 Lithium Battery Protection Board ensures safe, reliable operation of your lithium-ion battery packs by preventing overcharge, over-discharge, and short circuits. Its balanced charging circuit maintains battery health for extended cycle life, making it ideal for high-current, high-demand applications.
📦 Package Includes
- 1 × 3S 12V 25A 18650 Lithium Battery Protection Board
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