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Hack Needed: Rechargeable Halogen Spotlight Answered

Greetings all, I'm in need of a hack to replace the lead acid battery in a rechargeable halogen spotlight purchased at a local store. The spotlight came with a AC recharger but 15 charge time hours returns only approximately twenty minutes of usable light. I'd much like to replace the power source with something of a longer duration than the current one third of an hour. As much interested in simply rewiring the device to work from my car's AC outlet if possible. Mind I only have a few dollars invested in this device still I'd like to see if a replacement power source is worth the effort. Thanks to all who reply.



If the internal battery's voltage is 12 volts, then it can run directly off the car battery- just take the wires from a cigarette adapter and attach them to the appropriate wires. If it isn't, you would most likely have to buy a pretty heavy duty transformer to bring it down to whatever voltage is necessary from your inverter.

My thanks for the replies, I have a scan of the battery that has it's specifications. Attaching that image here, let's hope your suggested solution is a possiblity.

spotlight battery.jpg

Ok, so you have a 6 volt battery @ 4 amp-hours. Your light uses the entire battery in 20 minutes, or 12 amps an hour. So you would want a 6 volt 12 amp transformer... that's pretty big. Your inverter would want to be rated at least 75 watts continuous, as well.

most 1million candle power torches use a 6v55w halogen h3 lamp
12v h3 55w lamps are in some car headlights!
also why not use a 12v h3 and connect the wires that connect to the battery the the cigarette lighter socket? you can even get 100w ones =2million candle power(if you don't melt the lens!)

Because he wants to convert this one... not make a new one.


9 years ago

please can you take some detailed pictures of the insides and the battery(picture all wires..etc..)with the info on the battery so i can see it then i can hopefully give you instructions on how to get it to work off 12v(car,lead-acid battery..etc.)for as little as free!(depends on the insides and what you have lying around)