Question Anker Charger Battery Life

Nov 3, 2020
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I have had an Anker 79AN7917 phone charger for several years but have never really needed to use it. I like to keep it charged for storms/ power outages etc. Like the one coming now...
All I have been doing in charging it up to max once in a while to keep it fully charged. Is that bad for the battery life? Should I drain it and fully charge it at some point?
 

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