18650 Rechargeable Charger

18650 Rechargeable Charger
I’m thinking about getting a flashlight, what batteries would this one require?

UltraFire WF-016 SSC-P7 3-Mode 800-Lumen LED Flashlight with Assault Crown (1*18650)

http://www.dealextreme.com/p/ultrafire-wf-016-ssc-p7-3-mode-800-lumen-led-flashlight-with-assault-crown-1-18650-28687

Thats the name. If you could give me a URL or link to a battery on this site. All I want is a cheap rechargeable battery and charger that will run this flashlight for at least 90 min or so. I want the light to perform at it’s peak, I don’t know if voltage makes the light perform at a dimmer level, but lumens are important. Also, I’m using the flashlight for my airsoft gun so bare that in mind.

Here is the link you requested.

http://www.amazon.com/s/?ie=UTF8&keywords=18650&tag=mh0b-20&index=aps&hvadid=29404022&ref=pd_sl_6291czyxfo_e

TrustFire 18650 Rechargeable Li-ion Battery Travel Charger 4.2V 600mAh from Dinodirect.com