1)Please drain all the power of the battery for the first 3 times before charging, and then take a full charge. Thus the battery can be reached the optimum effect of using. Please note that its full effect and longevity is only achieved after 3 complete charge and discharge circles because Li-on Battery become stable after few uses. 2)Do not expose the battery to the air for a long time without the package, if not use, please put the battery in a Airtight box. 3)Adopting the imported Li-on cell or polymer Li-on cells which are safe and have stable performance, high capability ( 6Month Guarantee )