Simple Guidelines to Prolong Lithium-ion Batteries

• Do not discharge Li-ion too low; charge more often. A random or partial charge is fine. Li-ion does not need to be fully full charged as with lead acid.
• Heat the battery to room temperature before charging. Do not charge below freezing.
• Limit the time the battery resides at 4.2V/cell (full charge), especially when warm.
• Moderate the charge current to between 0.5C and 0.8C for cobalt-blended lithium-ion. Avoid ultra-fast charging and harsh loading.
• When possible, lower the charge voltage limit to prolong battery life.
• Keep the battery cool. Move it away from heat-generating environments. Avoid hot cars and windowsills that are exposed to the sun.
• It is not necessary to unplug the laptop from the power grid when not in use. The charger stops charging when the battery is fully charged.
• When the SoC fuel gauge becomes inaccurate, calibrate smart batteries by applying a deliberate full discharge and charge. 
• Add some charge before a long storage. The charge level is not as critical as cool storage.

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