In times gone by, we used to run cars and aeroplanes until the batteries gave up, before waiting for the next time we could use them again. Put simply, we just stored them dead; however, this is not the case with LiPo batteries. Having said this, LiPo's should not be stored at full charge either. We would recommend storing them at room temperature at 3.8v per cell to get the longest life out of them. The majority of modern computerised chargers have a Lipo storage function that charges the batteries up to that voltage or discharges them down to that voltage.
Vapextech would recommend that customers put their Lipo's in storage mode after every run, as making this force of habit will benefit you in the long run. This means you don't have to worry about whether or not you remembered to put it in storage. We have had customers come to us in the past with batteries that have died because they charged them up, intending to use them and forgot to put them back to storage voltage. Lithium-Polymer batteries can be damaged by sitting fully charged for as little as a week, although this does not mean they will get damaged every time they are left for over a week. So don't forget to put your LiPo's at storage voltage once you are done using them. They also need to be stored in a fireproof container of some sort, as this will protect your workshop in case the LiPo does combust. Some people use empty ammo boxes, fireproof safes and ceramic flower pots; whatever you choose will be worth it in the unlikely event something untoward should happen.
The most common problem you can have with LiPo batteries is not storing them properly. When this type of battery sits for a long period of time, it tends to discharge itself. If it drops below 3.0V per cell, the vast majority of LiPo charges will not charge it. In some instances, batteries with this issue can be rehabilitated, but by the same token, they can also be a lost cause.
If you have any questions about LiPo batteries and the best way to store them, please do not hesitate to get in touch now.