9v 6f229 PHILIPS Long life battery in Pakistan

BAK 21700 3.7V 4500mAh LiFePO4 battery is a type of rechargeable battery that uses lithium-ion (Li-ion) as the cathode material. Li-ion batteries have several advantages over other lithium-ion batteries, such as higher safety, longer cycle life, lower self-discharge, and better performance at high temperatures.