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원문 게시자: JasonZee ,

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You can purchase USB ammeter such as :

https://www.ebay.com/itm/USB-Digital-LED-Display-Current-Voltage-Voltmeter-Ammeter-Charge-Detector-Meter-/113686864408

this will tell you  if the battery is taking a charge. The ammeter should show a current draw if it’s still good. You then can then decide if you want to proceed with a battery replacement.

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