How long does a Li polymer battery last?

The lifespan of a Li polymer battery, also known as a LiPo battery, can vary depending on several factors such as usage, charging habits, and storage conditions. Here is some information b:

1.     LiPo Battery Lifespan:

·         Most LiPo batteries are not rated to last longer than 300~500 charge cycles .

·         A charge cycle is defined as a full battery being drained to 2.75V and charged to full capacity again.

·         The lifespan of a LiPo battery can also be affected by its age, with GMB stating that they typically last around 2 or 3 years with regular use and charging .

·         However, it's important to note that measuring the lifespan of a LiPo battery based solely on time or charge cycles may not be practical, as batteries go through varying depths of discharge during usage.

2.     Signs of Aging:

·         As a LiPo battery ages, it may show signs of expansion or puffing ---normally 3%~10% depends on the size.

·         Swelling occurs due to the gas generated by the decomposition of the battery's electrolytic solution.

·         A swollen LiPo battery not only has reduced performance but also has a higher risk of catching fire when overheated.

3.     Factors Affecting LiPo Battery Aging:

·         The aging process of LiPo batteries is influenced by various factors, including the formation of a solid electrolyte interface (SEI) on the anode and electrolyte oxidation on the cathode .

·         These layers accumulate over time and diminish the li polymer battery's capacity to hold a charge.

·         Electrolytic decomposition is another process that contributes to battery deterioration, leading to gas production and expansions.

4.     Tips to Extend LiPo Battery Lifespan:

·         Store LiPo batteries in a cool place(room temperature) to slow down the aging process .

·         Avoid overcharging the battery(normally GMB will install PCB for that).

·         Follow the  recommendations by GMB for proper handling and storage of LiPo batteries.