First, understand specifically what battery and battery device you are using. Generally people charge them when the device quits firing they have not experienced batteries prematurely dying. Is that the right way to recharge your device, lets explore..
We use lithium batteries in our vaporizers. In general, there are several varieties of lithium batteries in use, the most common: ICR, IMR, and Li-Poly.
Ego devices and the new box mods use Li-Poly batteries which are not removable and use a USB charging cord. Most "mods" or APV's use lithium external removable batteries which are charged in a box charger.
Lithium batteries will see the longest life if they are charged frequently without being completely drained with each use. So, its better to pull the battery sooner than later and recharge it than to drain it down to where it will no longer work in the device. Unlike some other chemistry batteries, lithium batteries do not need to be completely drained before recharging. A lithium battery used in vaping is considered to be drained when it reaches 3.4 volts; allowed to drain lower than 2.5 volts may be critical to the life of the battery.
Regulated devices cut off between 3.2 to 3.5 volts. It will make no difference at all if they are routinely charged at 3.8 or 3.2 volts as we are not even approaching the lower limits of the batteries.
Letting it discharge much lower can damage the battery.
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