3.7V 400mA Lithium Battery Charger SM2P Plug Cord Power Bank

Keep your lithium-powered devices topped up and ready with the 3.7V 400mA Lithium Battery Charger with SM2P Forward Plug. Designed for power bank modules and single-cell lithium battery packs, this compact charging cord delivers steady, controlled power through an intelligent IC control circuit — ensuring constant voltage and current throughout every charging cycle.

Built from durable plastic and metal, this charger is engineered to last. Its intelligent protection circuitry automatically manages the charging process, helping to safeguard your battery from overcharge and voltage irregularities. Whether you're maintaining a DIY power bank, a small electronic project, or a rechargeable module, this cord is a reliable everyday tool.

Key Features

• Output: 3.7V / 400mA — ideal for single-cell lithium battery charging
• Connector: SM2P forward plug for secure, polarity-correct connections
• Intelligent IC Control: Constant voltage and constant current (CV/CC) charging for consistent, safe performance
• Intelligent Protection: Built-in overcharge protection circuitry
• 60cm Cord Length: Flexible reach for a variety of setups and workspaces
• Materials: Sturdy plastic and metal construction
• Compact Design: Easy to store, carry, and use in tight spaces

What's in the Box?

• 1 × 3.7V 400mA Lithium Battery Charger with SM2P Forward Plug Cord

Who Is This For?

This charger is perfect for electronics hobbyists, makers, and anyone who works with single-cell lithium battery modules. It's a simple, no-fuss solution for power bank maintenance, DIY electronics projects, and small rechargeable battery applications.

For more information on safe lithium battery charging practices, refer to guidance from the U.S. Consumer Product Safety Commission (CPSC).

Frequently Asked Questions

Q: What type of batteries is the 3.7V 400mA SM2P Lithium Battery Charger compatible with?

A: This charger is designed for single-cell 3.7V lithium-ion or lithium polymer batteries, commonly found in power bank modules, DIY electronics projects, and small rechargeable devices. Always verify your battery's voltage and connector type before use.

Q: What does the SM2P forward plug connector mean?

A: The SM2P connector is a 2-pin JST-SM style plug commonly used in lithium battery packs and power bank modules. The "forward plug" orientation ensures correct polarity alignment, reducing the risk of incorrect connection during charging.

Q: What safety features does this lithium battery charger have?

A: The charger features an intelligent IC control circuit that delivers constant voltage and constant current (CV/CC) charging. It also includes built-in overcharge protection, which automatically manages the charging process to help protect your battery's health and longevity.

Q: What is the cord length on this charger?

A: The charging cord is approximately 60cm (about 24 inches) long, giving you flexible reach for use in various workspaces, project setups, or charging stations.