MobileRead Forums - View Single Post - Troubleshooting Can I use any USB wall (mains) power to charge my Kindle?

bbusybookworm · 10-24-2009, 01:17 AM

Keep in Mind that Not all Wall USB Chargers output the same Amperage.

So While the USB Standard is 5V 0.5A, Specific Chargers Often Output an Higher Amperage.

So My iPhone USB Charger Outputs 5V 1.0A, which is much higher, and while most devices will usually charge, though a bit faster from an higher amperage device, some may not, or may misbehave.

From what I've found, the Kindle's own Power Adaptor Outputs 4.9 Volts, 0.85 Amps, so the iPhone's charger may be overdriving it, causing the issues mentioned.

To play on the safe side with most devices, its usually better to get a Wall wart that outputs 5V 0.5A as it will be supported by all, though it may charge devices a little slower.

Hope this Helps.

10-24-2009, 01:17 AM	#8
bbusybookworm Tech Junkie Posts: 1,027 Karma: 10080 Join Date: Aug 2007 Location: Earth Device: iPad, MotoXStyle, OnePlusOne	Keep in Mind that Not all Wall USB Chargers output the same Amperage. So While the USB Standard is 5V 0.5A, Specific Chargers Often Output an Higher Amperage. So My iPhone USB Charger Outputs 5V 1.0A, which is much higher, and while most devices will usually charge, though a bit faster from an higher amperage device, some may not, or may misbehave. From what I've found, the Kindle's own Power Adaptor Outputs 4.9 Volts, 0.85 Amps, so the iPhone's charger may be overdriving it, causing the issues mentioned. To play on the safe side with most devices, its usually better to get a Wall wart that outputs 5V 0.5A as it will be supported by all, though it may charge devices a little slower. Hope this Helps.