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My portable "power bank" battery is badly dented. Should I be using it? - Factual Questions - Straight Dope Message Board
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The Risks And Benefits Of Using A Power Bank: Understanding The Potential Impact On Your Phone Battery - Snow Lizard Products
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Will Charging With Portable Battery Bank Damage a Phone's Battery? – iWALK Portable Power Bank, Portable iPhone Charger, True Wilreless Earbuds
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