Hi Guys,

I just bought the trailtech MR16 HID bike light and have a few questions about it. The performance is awesome. However, is it OK to use 11 volt lithium packs? I realize that batteryspace even sells a combo with that light and a lithium pack, but the instruction sheet recommends power sources of 12 volts and greater. The pack will get down under 11 volts even when half the charge is remaining.

The main issue is life of the bulb. Do they last longer using a true 12 volt source such as a metal-acid or a 10 to 11 cell nickel pack? What is the upper limmit on voltage imput--batteryspace recommends not using 4 cell lithium (13.8 volt).

If necessary, I'll buy a whole new battery pack to maximize bulb life.

Thanks guys.