Actually, lithium-ion battery should not be over charged, if it is done then the small fibers inside battery starts to expand a lot and touches each other resulting short-circuit which will decrease battery performance. Nether the battery should be over discharged, it will reduce charge cycle numbers (shorten lifespan of battery) so, better quickly charge after 50% or more will make battery lifespan longer.
The future certainly looks like it is full of wearables. … more
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