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Old 10-21-2020, 06:51 PM   #241
JSWolf
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Quote:
Originally Posted by james_ View Post
Your phone charger will work fine with this cable combination as you've probably figured out by now. Best thing to do if you have a few USB powered devices is spend a few dollars on a 'USB safety tester' like the picture below = available from Chinese suppliers on pretty much all auction sites. It will tell you the volts and amps drawn by any device plugged into it, which is usually enough to know whether its charging properly or not. Especially useful for devices that appear to be dead for one reason or another.
Why do we need a USB safety tester? I don't buy cheap generic USB chargers. I buy known brands.
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Old 10-21-2020, 11:19 PM   #242
DNSB
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Quote:
Originally Posted by JSWolf View Post
Why do we need a USB safety tester? I don't buy cheap generic USB chargers. I buy known brands.
Umm... Jon, one acquaintance blew their ereader using an LG phone charger. Evidently the negotiation did not work happily and his ereader was treated to a 12V charging voltage at potentially 25W. Of course, LG is not a well known brand.

BTW, the USB tester I picked up is more of a X shape with USB A and USB C input/output ports and a switch to allow interrupting the power connection. Possibly not the best $25 I spent but still a worthwhile purchase.
Last edited by DNSB; 10-21-2020 at 11:22 PM. Reason: Added comment about USB tester
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