3.7V 400 mAh Lithium Batteries 502040

3.7V 400 mAh Lithium Batteries 502040

Please note that we have a MOQ for our battery. For batteries in stock, the MOQ is 20,000 pcs. For customized batteries, the MOQ is 50,000 pcs.

Hanery assists you throughout your project: battery size, capacity, discharge multiplier, operating temperature, safety, and associated protection circuitry. Please contact us or mark your requirements on the inquiry quotation.

Order single or thousands of items at a time. Our warehouse and flexible shipping options are available for last-minute, deadline critical orders.

Free Sample

*Customization is always available, please mark down your need in form or just contact us.

Battery Specification

1. Mechanical Characteristics

Cell502040PCMYes
NTCNoWeightappr. 7.0g
Configuration1S1P 

2. Electrical Specification

Capacity400mAhNominal Voltage3.7V
Energy1.48WhInternal Resistanceless than 100 mΩ
Max. Charge Voltage4.2VDischarge Cut Off3.0V
Max. Charge Current200mAMax. Discharge Current200mA
Standard Charge Current400mAStandard Discharge Current400mA
Charging Temperature0℃ to 45℃Discharging Temperature-20℃ to 60℃
Storage Temp.Range

1 year at -20℃ to +30℃

3 mos. at -20℃ to +45℃

1 mo. at -20℃ to +60℃

Cycle life

100 cycles ≥92%

300 cycles ≥88%

500 cycles ≥80%

3. Cell protection

Overcharge Detection4.28V ±50mV (80 to 200msec delay, release 4.08V ±50mV)Overdischarge Detection2.4V ±100mV (40 to 120msec. delay, release 3.0V ±100mV)
Overcurrent Detection2.5A to 4.5A (5 to 10msec. delay)Short protectionYes

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