I feel I must pass this on to the guys that I sort of got fired up on some flashlights here. This charger, so I am told from one more knowledgeable than me is the best charger you can buy for under $80. Now this is to charge only 3.7v 18650 batteries. The cheapest I have found this charger has been around $20. But I found this and bought one.
http://cgi.ebay.com/XTAR-WP2-Battery-Charger-/170671437988?_trksid=p5197.m7&_trkparms=algo%3DLVI%26itu%3DUCI%26otn%3D4%26po%3DLVI%26ps%3D63%26clkid%3D1949028329562146401
Also I mentioned about the cheaper batteries in another post. I have since learned that those batteries aren't the way to go and aren't as safe as the protected batteries that cost more. The guy that told me about the charger also told me these are about the best batteries made for the money. He said they will hold a charge longer and handle the current better to the stronger bulbs and be much safer. He also told me that good batteries can makea light twice as bright.
http://cgi.ebay.com/XTAR-18700-3-7v-2600mAh-Sanyo-Protected-Batteries-x-2-/160634168790?pt=US_Batteries&hash=item25668ae5d6
http://cgi.ebay.com/4pcs-XTAR-18700-3-7V-2600mAh-Sanyo-Protected-Battery-/150642478575?pt=US_Batteries&hash=item2312fdcdef
And he said the Trustfire flame 2400MAH 18650 batteries were almost as good.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=260750543965&ssPageName=STRK:MEWNX:IT
My mistake. It will charge 14500/ 18500/ 14650/ 17670/ 18650/ 18700 Li-ion battery.