Avoid frequent full discharges: Several partial discharges with frequent recharges are better for lithium-ion than one deep one.
Avoid frequent full discharges because this puts additional strain on the battery. Calibration is important: Batteries with fuel gauge (laptops) should be calibrated by applying a deliberate full discharge once every 30 charges.
If ignored, the fuel gauge will become increasingly less accurate and in some cases cut off the device prematurely. For prolonged storage: Keep the lithium-ion battery cool.
Avoid a hot car. For prolonged storage, keep the battery at a 40% charge level.
Consider removing the battery from a laptop when running on fixed power. Keep it cool: If you have a spare lithium-ion battery, use one to the fullest and keep the other cool by placing it in the refrigerator.
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