MEXICOWANDERER wrote:
Using watt hours is like rating a toaster in mega calories.
The chemistry in those batteries is totally different than standard off-the-shelf Li-Ion. The vendor is ADAMANT that operating voltage is 1.5 not 1.2 volts. So a standard Li-Ion charger will not work. Perhaps a charger for rechargeable alkaline? I now have all the buckers I need so that would not be a problem.
A standard small battery is 3.7 volts.
I am looking for a diving headlamp for Jesús. Powerful. 3-hours of work time on the brightest setting and rechargeable batteries. Something that is worth less than my clunker car.
As basic as it gets, but, about 2 hours is realistic on the battery. If you could find something like this that held two 18650's in parallel, that would do the trick.
http://www.dx.com/p/new-608-cree-xm-l-t6-1000lm-1-mode-white-light-diving-flashlight-fluorescent-green-1-x-18650-160052#.U2UcYehX-uY
Another option, brighter, and much more capacity batteries with 26650's versus 18650's.
http://www.dx.com/p/trustfire-tr-df002-3-x-cree-xm-l2-t6-1500lm-2-mode-white-diving-flashlight-dark-khaki-2-x-26650-236414#.U2UdRuhX-uY
I think you'll find your 3 hour parameter kills you when pitted against the value of your clunker.
