Originally Posted by
jeff-o
That's true, but was the original light designed for alkaline or rechargeables? In any case, the light will be brighter at 9V and still be operating at a safe voltage. Batteryspace.com has both 8.4V and 9.6V nimh packs, either of these would work fine (as would a 7.2V pack)
An 8.4V pack might work but the 9.6V would probably be too much. A 7.2V is pushing a 6V bulb 10%, I'm not sure you can push them 30% and still have any useful life for the battery.
Most of the Cygo systems I've ever seen are rechargeable. All battery has a very nice 4500 mAh RC car battery for around $30.