Quote:
Originally Posted by Ghoda
Make sure that your wall charger is not rated higher than the Kobo is designed to receive - I believe standard USB pushes up to 500mA at 5V and the label on the Kobo says it will accept 750mA at 5V. Using a charger that is 'too strong' will cause the battery to think it's fully charged long before it really is. I use a wall charger that is rated at 350mA at 5V - takes a couple of hours to charge and the charge lasts a few weeks.
For the record I also see this same behavior on my cell phone and wireless headphones (low amps on a long charge = awesome).
Bottom line - if you've got the time a trickle charge at low amperage is always better than a quick charge at higher amperage.
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I always thought with mA rating was the maximum the charger can put out, not what it does put out consistently. What I mean by this is if a wall charger is rated 5v 1A and the device charges at 5v 750mA, then all the device will pull from the charger will be 5v at 750mA. Same goes if the device is say 5v 1.5A, because the charger has a maximum output of 1A, that is all the device will receive.