OK, need help/basic instructions for a backpack-powered flash light!

[4x4Dragon]

Hello, I was wondering if anyone could help me with an idea.

Im wanting to take my Sam's Choice 2aa(PR bulb and faceted reflector) and wire it to 2,3,or 4
6-volt batteries in a pouch/carrying case. NO, im not wanting to run the light at 12,18,or 24 volts(major meltdown), im wanting to run 6 volts into a 4.8v bulb(kpr113, etc..)in the little Sam's light with the goal of having a VERY long runtime for night hiking/camping/hunting, etc... and just having the battery back in a small backpack of some sort

Im basing this on the idea of how the PT Surge is the same brightness with 8 or 4 AA batteries. I know is has something to do with the battery hook-up configuration, but that's as far as my knowledge goes.

Thanks in advance

 

[Rifter]

Why dont you just get a light with a long burn time? my 5D mag light modified with a 5W Cyan LS will burn for 12 hours at full brightness, and weigh less than 4 6V batteries by a long shot, and it turns out 120 lumens which is more than enough light for camping/trailwalking which is what i use it for.

 

[Albany Tom]

Well, a kpr113 runs really great from one 6v lantern battery. If I were going to go to the trouble, I'd find a cheap headlamp that could take a PR bulb, and wire that up to a lantern battery, that you'd then throw into your backpack.

A lantern battery has about 2x the capacity of a D cell of the same chemistry, so that ought to last a long time.

 

[B@rt]

The Rayovac Luma 2 has a power backup...

Here is a video of the Rayovac LUMA 2 Flashlight: 56.7 K , broadband .

 

[EMPOWERTORCH]

If you really need to use a backpack I'd go for a 12V dichroic halogen light fitting powered off a SLA. I thought about a motorbike battery, but these aren't sealed and cannot be oriented upside down. SLA batteries are available in a wide range of capacities and currents, and one should fit quite neatly into a large haversack or knapsack.
Your 6V into a 4.8V bulb would result in a very bright, short lived light. Overdriving any filament bulb will drastically reduce its life!
A 12V dichroic would be considerably more reliable, and a 5W cyan equipped torch even more so.

 

[bushcamp]

i got a 12 volt power supply from "batteries plus"
which came with a nylon shoulder-type carry bag, a 17amp-hour sealed battery connected to a cigarette light style outlet serving as a power port, and a small ac battery charger. i don't recall if larger batteries were available but i know smaller (in amp hr capacity) ones were.

i use mine in the bush as a back up for the cell phone and vhf radio transceiver.

batteries plus might be able to come up with the same kind of apparatus in other voltage such as
6vdc or 9vdc.

that at least would take care of the auxillary power for you