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Rechargeable flat lithium battery cell 443441 3.7v 650mAh power lipo batteries for bluetooth audio

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OEM ODM PCM protected lipo battery cell 443441 3.7v 650mAh rechargeable power batteries
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OEM ODM PCM protected lipo battery cell 443441 3.7v 650mAh rechargeable power batteries

Model:LP443441

Voltage:3.7v

Capacity:650mAh

Dimension:4.4*34*41mm

MOQ:100pcs

Delivery time:7-10workdays

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Technical Specifications
 
Item Specification
Battery Type 3.7V 650mAh LiPo Battery
Charge Voltage 4.2V
Nominal Voltage 3.7V
Nominal Capacity 650mAh @ 0.2C Discharge
Charge Current Standard: 0.5C, Rapid: 1.0C
Standard Charging Method 0.5C CC charge to 4.2V, then CV charge till current ≤0.05C
Charging Time Standard: 2.75 hours, Rapid: 2 hours
Max Charge Current 1.0C
Max Discharge Current 1.0C
Discharge Cut-off Voltage 2.75V (0.2C)
Operating Temperature Charging: 0°C ~45°C, Discharging: 0°C ~45°C
Storage Temperature -10°C ~ +45°C
Dimensions Length: 41±2mm, Width: 34±0.5mm, Thickness: 4.4±0.2mm
Drop Test Dropped from 1m twice onto concrete – no fire, no leakage
Cycle Life ≥500 times
 
Voltage Comparison: 3.7V vs 3.8V Batteries
 
3.7V Lithium Battery
 
Nominal discharge platform voltage is 3.7V, full charge voltage typically 4.2V, discharge cutoff voltage generally 3.0V.
 
3.8V Lithium Battery
 
Nominal discharge platform voltage is 3.8V, with some models reaching full charge voltage of 4.35V. Discharge cutoff voltage mostly set at 3.0V or slightly higher.
 
Energy Density
 
3.8V batteries typically use advanced cathode materials, allowing them to store more energy in the same volume or weight, resulting in higher energy density.
 
Cost & Safety
 
3.8V batteries are more expensive due to complex materials and processes. 3.7V batteries are technologically mature with lower costs and easier safety assurance.
 
Applications
  • Smart Wearables: smart watches, fitness trackers, health monitors
  • Portable Audio: Bluetooth earphones, mini speakers, headset charging cases
  • Personal Care: electric toothbrushes, facial tools, mini massagers
  • Smart Devices: remote controls, electronic toys, LED lights, tracking devices
  • Home & Security: smart doorbells, wireless sensors, small surveillance gadgets
  • Industrial & Medical: portable testers, small medical devices, handheld instruments
Quality Assurance
 
A-Grade Battery Cells
High-quality materials, sufficient capacity, long battery life, safe and non-explosive
High-Performance Protection Board
Stable voltage output, prevents overcharging, over-discharging, and short circuit
International Standard Lead Wire
High-quality wire with strong conductivity, supports high-probability discharge
Wide Nickel Tabs
Excellent thermal and electrical conductivity, reduces heat generation, ensures stable current output
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