Do lithium batteries degrade if not used?

A high-end lithium-polymer battery can lose about 20 percent of its capacity after 1000 charge cycles. And batteries degrade even if you don’t use them. According to battery-testing firm Cadex Electronics, a fully charged lithium-ion battery will lose about 20 percent of its capacity after a year of typical storage.

Can lithium batteries be left uncharged?

The state of charge (SoC) in a lithium-ion battery should never dip below 2V per cell, even for a short period. If left uncharged any longer, the battery capacity reduces significantly, and in some cases, it may reduce the battery capacity completely.

Do lithium-ion batteries age?

Yes. Lithium Ion batteries suffer from aging, even when they are not being used. Battery scientists don’t yet have a full understanding of why this happens, but they have found some clues. There seems to be two different things going on that explain the aging.

Will the lithium battery be damaged if left unused?

Compared with traditional lead-acid batteries, lithium batteries have the characteristics of high open circuit voltage, low self-discharge, high discharge rate, wide operating temperature range, fast charging speed, no memory effect, and no pollution. So, Will the lithium battery be damaged if left unused for a long time? The answer is: yes!

What is the average life of a lithium-ion battery?

Bosch, DeWalt, Metabo HPT (Hitachi), Makita, Milwaukee, and Ridgid all warranty their Lithium-ion batteries for 2–3 years. That’s a real good indicator of their minimum expectations for those packs. If you take care of your batteries, there’s no reason not to expect them to last at least that long or longer.

What should I do if my battery has been unused?

When a battery has been unused for 6 months, check the charge status and charge or dispose of the battery as appropriate. The typical estimated life of a Lithium-Ion battery is about two to three years or 300 to 500 charge cycles, whichever occurs first.

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