With winter rapidly approaching, us hobbyists begin to find it quite difficult to get any flights in! While it may be tempting to leave your batteries charged and ready to go at a moment’s notice (such as a 10 minute burst of sun in the middle of stormy Seattle day), this is quite bad for the life of your batteries. Winter is a good reminder to check all your batteries, and make sure they are at storage voltage!
Lithium batteries have come a long way, and have significantly propelled our hobby (pun intended) with more power, longer run times, and less weight. In order to maintain the quality of Lithium batteries, they must be taken care of appropriately.
When you buy our Spyder batteries, you may notice that all of the cells arrive at about 3.8 volts. The reason for this is LiPos like to be stored around half full. You can see from this chart that there is virtually no degradation when properly storing a LiPo, 40% full and at or below room temperature. If you were to store your battery fully charged however, after 1 year at room temperature, you will lose 20% of the capacity of the battery. So your 3S 2200mAh is now a 3S 1760mAh, and you can quickly see how easy it is to over-discharge the pack and things will degrade even more.
Image from www.batteryuniversity.com
So after a day at the field, track, or yard, check those batteries! If they are between 3.8 and 3.9 volts, they are ready for storage, any more or less, and use the storage function on your charger to bring them up, or drain them down to the appropriate voltage. Keep in mind if the battery needs to be discharged from full, this could take a while on a charger (that’s a lot of energy / heat to dissipate!) so running the battery down part way on your model is usually the quickest way to do it.