I feel like a kid in class who just can't get the latest problem in algebra 1... or battery size + bulb wattage = burn time 101, that is. So if I can impose on y'all one more time...
I've got this battery/charger combo http://www.batteryspace.com/index.as...OD&ProdID=2462 from batteryspace.com. I have taken careful note of the first 6 full charge/discharge cycles with a 12V 20W halogen bulb.
1st 45 min.
2nd 1 hr. 10 min.
3rd 2 hr.
4th 2 hr.
5th 2 hr. 10 min.
6th 2 hr. 5 min.
So the burn times seem to be topping out at a little over 2 hrs. Some folks have suggested that this battery/bulb combination should be good for over 3 hrs. While that would be great, I wonder if it is a bit optimistic, since others have suggested that over-volting a given bulb will cause it to draw more power than the classic equation would indicate.
I got a responce on batteryspace's forum who's language led me to think the responded works there. The person was very nice, said the battery/bulb combo should be good for nearly 3.5 hrs, and if I continued to experience short burn times after careful break-in I should return the unit for inspection. But I don't really want to endure a round of return for inspection, only to have them declare the unit sound and ship it back (all at my expense) if what I am experiencing is simply real world performance.
So what say you? Anyone running this particular battery with a 20W bulb themselves? If not, could the experts weigh in before I contact batteryspace.com? Thanks for your time. Sorry for being so long winded.
PS: I will way that last night I bombed down a dark descent that had me riding my brakes when I was running twin CatEye EL500 LED's. I'm no longer blind. I CAN SEE!