What is storage Charge?
We all know that LIPO batteries must be looked after if you expect them to perform properly for any great length of time. Keeping your batteries at storage voltage is vitally important because the health of a battery deteriorates more quickly when fully charged. Storage Charge is 3.7v and is considered half charged at this point. You will often find batteries arrive to you between 3.65v and 3.85v because these are considered safe for storage.
Why does it take so long to reach storage voltage?
Often chargers come equipped with a basic charge/discharge function that will bring a battery down to 3.75v per cell, however, this can take hours. This is because the charger has to convert the chemical energy in the battery to heat and most chargers can only handle a few watts . There is only so much heat a charger can dissipate. It’s going to be quicker to fly the packs at the field because it could take 10-30 hours just to discharge everyday RC lipos.
Alternative methods to discharge Lipo batteries
There are plenty of ways to skin a cat and we can get a little creative here. The whole aim to bring the battery to resting voltage as quickly and easily as possible.
is a feature is offered in high end chargers like the reactor. This function is used to discharge the lipo but rather than convert the energy to heat the charger is able to recharge a lead acid battery, a car battery for example. This is a great feature to use if you have ever flattened your battery at the field.
can be made easily by removing the heating element from an old hair dryer and using a simply fan to dissipate the heat. Attach 8wg wire to the element along with an Xt60, and your good to go.
are another option that is cheap, reliable and easy to use. It is reasonably simple to wire up globes using sockets that are easily available at hardware stores or electronic distributors depending on the fitting used. You will need to keep an eye on the voltage because if you need to flatten a 6s battery you’ll need to run 2 x 12v globes in series.
Once your battery is at the desired voltage you should keep your battery in a LIPO bag for your own protection. The battery should not be stored inside your house and ideally left in a cool dry location. LIPO batteries are safe but it’s about taking precautions. They have been known to burst into flames if they are damaged, or otherwise mistreated.