3.7V 4400mAh 18650 LED Light Lithium Battery

Additional information

Rated Voltage


Rated Capacity


Battery Size

67×37.5×19mm Max

Charge Temperature


Discharge Temperature




Lithium Battery Process Work Flow

We are a professional lithium battery factory in China. Now we briefly introduce how to produce lithium batteries. It starts from cathode & anode mixing, coating, baking, calendering, automatic slitting & cutting, winding, top & side sealing, electrolyte injection, pressing formation, forming, capacity grading, OCV1 & OVC2, cell to PCB, insulation and shipping. Welcome to contact and ask for the workflow table list.

Product Details

Battery model: 18650-1S2P/4400mAh/3.7V
Nominal voltage: 3.7V
Nominal capacity: 4400mAh (discharge at 0.2C to 2.75V)
Factory voltage: 3.6~3.9V
Product size: MAX67×37.5×19mm
Product internal resistance: ≤150Mω
Output mode: UL1007 24#100±5 Red and black, stripping 2±0.5mm
Executive standard: GB/T 18287-2000
Warranty period: 12 months
Working temperature: 0~45℃ (charging), -20~60℃ (discharging)
Battery charging: charging limit voltage: 4.2V charging current: 2200mA (standard), 4400mA (maximum)
Battery discharge: discharge cut-off voltage: 2.75V discharge current: 880mA (standard), 4400mA (maximum)

3.7V lithium battery product advantages and features:

  • Built-in lithium battery protection board to prevent overcharge, overdischarge, overcurrent, short circuit, etc.;
  • The protection board adopts Japan Seiko S8261-G2GIC, with mature technology;
  • Optional batteries: Sanyo, Panasonic, Samsung, domestic batteries, etc.;
  • The product model is complete, and can be individually designed according to customer requirements (voltage/capacity/size/circuit)
  • Comply with the relevant standards and requirements of GB/T18287-2000 for lithium batteries;
  • The finished lithium battery has been strictly calibrated and tested before leaving the factory, and users can use it with confidence;
  • Cycle life of lithium battery pack: under normal working conditions, the cycle life of lithium battery pack is up to 500 times;
  • Product packaging: simple and beautiful PVC film packaging, spray code logo.

4.2V Lithium Battery Charger Selection:

The charging limit voltage of the 3.7V lithium battery pack is 4.2V, and the standard charging current is 0.5C (4400*0.5=2200mA).
Therefore, we should choose a 4.2V lithium battery charger with an output current of 2.5A and a constant current and constant voltage charging mode.

Application areas: portable electronic products, instrumentation handheld terminals, medical instruments, laser instruments, etc.

Ask For A Quick Quote

We will contact you within 1 working day, please pay attention to the email with the suffix “@hlcbattery.com”