Best Practices - Lithium Ion Batteries
Tuesday, June 5th, 2007If you're new here, you may want to subscribe to my RSS feed, or register a username and be kept in the loop of special updates. Thanks for visiting!
Lithium Ion batteries are everywhere these days. Cellphones, Notebooks, iPods, PDAs etc. Even though we’ve come a long way from NiCd batteries which built up memories, Li-ion batteries however, are still susceptible to losing their chutzpah. Li-ion batteries are generally good for 300-500 charge/discharge cycles (2-3 years), and it’s not a good idea to let them discharge completely. I find this fact particularly interesting because 90% of people at electronic stores have told me to only recharge a battery once it has fully discharged. This might have been the case with NiCd batteries but is not applicable to the Li-ion batteries used in our electrical devices today.
According to batteryuniversity.com, for example, a worst case scenario is when using a notebook plugged into an AC socket with it’s battery fully charged. The problem comes in with the amount of heat the battery is subjected to, as heat decreases it’s lifespan. I’d suggest removing the battery when you’re working off an AC socket.
A Li-ion battery should also never be stored when it’s fully discharged. Apparently the best charge to keep a battery stored at is around 40% (how manufacturers ship the batteries). So to be safe, apply a charge to the battery before storing it, and charge fully before use.

