mspalt

If you use a cell phone charger, make sure your find one that does 8 volts rated at equal to or greater than 1800ma to get accelerated charging like the Amazon powerfast. The stock 5v power supply takes four hours to charge an Amazon Kindle Fire while the Powersave cuts time down by an hour. I don't have a cell phone power supply that meets the powerfast's specifications at home, and don't want to purchase a knock off on Ebay, so I felt that the powerfast is a good deal since I get free shipping with prime.