Forma Just ordered new Kobo Forma

[JSWolf]

Originally Posted by james_

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.

[DNSB]

Originally Posted by JSWolf

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.