How harmful can be for a Li-ion battery is to remain deeply discharged (i.e. less than 20%) and unused after 3 months, how much affects capacity? - Quora
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Amazon.com: 3.7V 10000mAh 4 Cell Lithium ion 18650 37.0Wh Rechange Battery Pack with 2 Pin MTA-100 Connectors : Health & Household
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