Need help with my DIY rechargable halogen.
Well it's back to the drawing board on my DIY rechargable halogen project. I hope someone can help me understand where I went wrong.
I started with a 12 volt 20 watt halogen bulb from Home Depot, wired straight into the male plug for a 14.4V 5000mAh rechargable Ni-MH battery from batteryspace.com. http://www.batteryspace.com/index.as...OD&ProdID=2462 It took about 1.5 hrs. to charge the battery as instructed on the rapid smart charger.
Initially I was estatic with the intensity of the light, as well as the distance and pattern. Unfortunately, within .5 hr. the heat from the halogen bulb had melted the front of the housing I constructed out of PVC. Not such a big deal. It was super cheap to fabricate and version II woun't cost much either.
My main concern is that I only got about 45 minutes of rideable light on this initial charge. That just isn't going to get me home from work. Frankly; I was expecting more out of this bulb/battery combination, since batteryspace.com recommends it for HID and halogen bicycle lights. I'm hoping that someone here has some experience with this or a similar battery, and wouldn't mind answering a few questions.
1: Should I expect a 20 watt halogen to run longer on this battery?
2: If not, can you recommend a bulb which will give me a better burn time? I really need 2 to 3 hours.
Thanks in advance. DanO