Q: How can I keep my PowerPack 10000 from draining or losing battery capacity over time?
A: Avoid leaving the battery pack unused for long periods of time when it's out of juice. Charge it up to around 50% before putting it in storage. That'll extend the lifespan of the battery.
The reason behind this is that lithium-ion batteries will have problems when they are over-depleted. The built-in protective circuitry will cut off the power when the juice level falls below a low threshold. After that, juice will continue to drain, albeit at an extremely slow rate. That wouldn’t cause a problem if the user recharges it regularly during normal use. However, if the battery is left unused for a long period of time, like months or years, then additional depletion will get the battery into a state that’s not easily reversible even when it is later recharged. Over-depletion is not good for batteries. It is said that bloated batteries can sometimes happen.