Lithium Ion Polymer Battery Cell 606090 3.7V 7.4V 4000mAh 14.8Wh Rechargeable Li Polymer Battery Pack

Main Advantages:

‌Large Capacity‌: 4000mAh of actual capacity meets all-day use needs, eliminating battery anxiety. ‌

‌Small Size‌: Measuring 6×60×90mm, it's ideal for DIY power banks or handheld devices, balancing performance and portability. ‌

‌Cycle Life‌: Supports over 1000 charge-discharge cycles, maintaining stable performance even with long-term use. ‌

‌Compatibility‌: Compatible with a variety of management boards, suitable for mobile power banks, beauty devices, and other medical devices. ‌

Applications:

‌Mobile Power Banks‌: Replace traditional battery cells, improving battery life and reducing device size. ‌

‌Medical Devices‌: Handheld devices, such as beauty devices, require a balance between battery life and safety.

Compared with Ni-Mh/Ni-CD batteries:

Energy Density:
The energy density of lithium-polymer batteries typically ranges from 150-250 Wh/kg, while that of nickel-metal hydride batteries is approximately 60-120 Wh/kg. With the same capacity, lithium-polymer batteries are smaller and lighter. ‌

Safety:
Ni-metal hydride batteries are more stable in short-circuit or high-temperature environments, with a melting point as high as 400°C, making them less prone to spontaneous combustion. Li-polymer batteries, due to their solid-state electrolyte, are theoretically more resistant to crushing and puncture, but may present a risk of thermal runaway in high-temperature environments. ‌

Cycle Life:
Ni-metal hydride batteries can achieve up to 300-500 charge cycles, while lithium-polymer batteries generally exceed 1,000 cycles, with some reaching several thousand. ‌

Cost:
Ni-metal hydride batteries have lower production costs and a significant price advantage. Li-polymer batteries, due to their complex materials and processes, have higher initial manufacturing costs, but their price gradually decreases with large-scale production.

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