I bought a CygoLite Rover II. It's on its way now.
Already I'm thinking of getting a bigger battery. The NiMH water bottle battery it comes with is only good for 2 1/2 hrs on high. My max night ride is about that long, maybe longer sometimes. The battery is 4.8 V. Don't know the mAh capacity. The light is a 255 lumen total two LED. I think I read somewhere the battery is about 2500 mAh but I can't find that reference now. Does that square ( 4.8 watts ~= 255 lumens) ? EDIT - In another thread I see 1 watt ~= 40-50 lumens, so this is about right.
Question for the board: Is it OK to assemble a 4 x D cell (~ 10000 mAh) 4.8 V NiMH and just plug it in to the CygoLite? Would this give me about 10 hrs if it's a typical ~250 lumen LED light?
Question II: Does batteryspace.com give good service and sell good stuff? Will the batteries & charger last as expected?