Lithium Ion Battery Pack - 3.7V 4400mAh

High-Capacity 4400mAh Power: Consisting of parallel-connected high-density cells to deliver 4400mAh total capacity for long operational runtime in portable applications.

Integrated Protection Circuit Board (PCM): Built-in PCM protection circuit guards against overcharging, overdischarging, overcurrent, and short circuits for safe, reliable operation.

Stable 3.7V Nominal Output: Delivers consistent 3.7V power (4.2V peak charge voltage) to ensure smooth performance across sensitive microcontrollers and modules.

Pre-Wired Lead Wires with Connector: Pre-fitted with flexible, color-coded lead wires (red/black) and a standard plug interface for hassle-free connection without soldering.

Durable Protective Shrink Wrap: Enclosed in a tough blue heat-shrink sleeve that protects internal cells from physical wear and environmental exposure.

Rechargeable Li-Ion Cell Chemistry: Quality lithium-ion technology designed for hundreds of charge/discharge cycles with no memory effect degradation.

Housing Style: Dual 18650 cell battery pack bound in protective blue heat-shrink insulation.

Lead Wire & Connector: High-flex silicone-insulated copper leads with a 2-pin female connector plug.

Technical Specifications:

Capacity: 4400mAh.

Configuration: 1S2P / 3.7V Nominal / 4.2V Peak.

Cell Type: Rechargeable Lithium-Ion (Li-Ion 18650 Pack).

Color: Blue PVC wrapping with red/black wires.

Usage Advice: Charge exclusively using a dedicated 1S Li-Ion charger set to 4.2V max cut-off. Do not short-circuit, crush, or puncture the outer protective shrink casing.

Maintenance: Store at 3.7V–3.85V (approx. 50% charge level) in a cool, dry place when storing for long periods without active use.

Essential Medium-Capacity Battery Pack: Position as an ideal power source for LED lighting rigs, Bluetooth audio equipment, portable IoT gateways, and DIY electronics projects.

Highlight Built-In Safety & Plug-and-Play Wiring: Emphasize the factory pre-attached wiring harness and integrated safety circuit board that make it ready for immediate integration into custom builds.

Recommended Cross-Sell Add-ons: Pair with Lithium Ion Battery Pack - 3.7V 6400mAh, Lithium Ion Battery Pack - 3.7V 6600mAh, Lithium Ion Battery - 3.7v 10000mAh, and ESD antistatic mat 50x40CM PCB Welding Mat.

Featured Collection Essential: Display prominently on your 1 Cell Li-Ion Battery Pack (3.6V~4.2V) collection page under multi-cell 1S battery options.