HT4060: iPad: Charging the batteryLearn about iPad: Charging the battery
Currently Being ModeratedJan 8, 2013 4:22 AM (in response to B84)
It's not harmful per se. But yes, it will charge very slowly, as in take you all night and still not be fully charged. You'd probably be best served to go out and buy the appropriate adapter.
Currently Being ModeratedJan 8, 2013 4:23 AM (in response to B84)
It's not harmful but it will take longer to charge. You can purchase the 12W charger from Apple. See http://store.apple.com/us/product/MD836LL/A/apple-12w-usb-power-adapter?fnode=3c