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How to prolong the life of your Lithium Ion Battery

posted 24 Mar 2011, 09:25 by Brad Jackson   [ updated 24 Mar 2011, 09:44 ]
We receive many inquiries about how best to look after a lithium ion battery.
Here's my attempt at answering this question in laymen terms:

Many people have the false perception that fully discharging their lithium ion battery is "good for the battery".
This idea stems from the days of older battery technologies like NiCd or NiMH. These batteries were best treated by performing frequent full discharges (i.e. running them completely flat) and then recharging in order to counter the "memory" effect.

Exactly the opposite is true of Li Ion batteries, which are best looked after by recharging more frequently and keeping them "topped up".

Below is an excerpt from a very informative article about how to prolong the life of lithium ion batteries - courtesy of the author, Isidor Buchmann (

Similar to a mechanical device that wears out faster with heavy use, so also does the depth of discharge (DoD) determine the cycle count [for a Lithium Ion battery]. The smaller the depth of discharge, the longer the battery will last. If at all possible, avoid frequent full discharges and charge more often between uses. If full discharges cannot be avoided, try utilizing a larger battery. Partial discharge on Li-ion is fine; there is no memory and the battery does not need periodic full discharge cycles....

For those with an appetite for all the technical detail, the full article can be found here: