A USB charger is supplied with the Kindle Fire HD 7 Inch Tablet, which allows you to charge your Kindle via your laptop or a USB mains adapter. Some customers opt to purchase the Kindle PowerFast Charger for eReader and Kindle Fire - 501/1393 (http://www.argos.co.uk/static/Produ...
), which enables the Kindle to be charged via the mains, and significantly faster.
A majority of tablets only come with 5GB additional storage on the Cloud. However, all Kindle devices are an exception, featuring unlimited Cloud storage courtesy of Amazon.
I hope this helps.