90mAh High Capacity Li-ion Polymer Earphone Battery,Replacement Compatible for Huawei FreeBuds 3 Freebuds 4 4E Bluetooth Earphone with Tool Kits

Product description

• Cycle Life & Durability It adopts A-class lithium-ion polymer battery cells, featuring high energy density and long cycle life. It can withstand a large number of charge and discharge cycles without significantly reducing capacity. High-quality batteries can endure 800 to 1000 cycles or more,Retains up to 80% capacity after 800 full charge cycles.
• Fast Charging & Efficiency Adopting intelligent fast charging technology, it automatically matches the optimal current, and the charging speed can be increased by 30% When the battery is fully charged, it will automatically cut off power to prevent battery swelling. Please use the original charger to achieve the best charging effect.
• Safety Features The battery is equipped with insulating separators and IC smart chips inside,Equipped with multiple safety mechanisms like overcharge protection, over-discharge protection, short-circuit protection, and thermal management systems It automatically reduces frequency or cuts off power in high-temperature environments, and the operating temperature range covers -20 to 60 .