The P7 he sells is a great light.. He also sells batteries and a charger.. The batteries are very good but they are unprotected cells which is not the best.. The charger he sells is a DSD charger which is fine..
If you bought that as a package to get started it would be fine.. I would just order some of the Ultrafire 3000 mah cells.. These cells will make that light a workhorse.. It will give you close to 2 hours of useable light..
http://cgi.ebay.com/Ultrafire-Rechar...lenotsupported