Re: How can I easily mod a Maglite 3D flashlight?
Are the batteries included in the $30 budget? Rechargable batteries are expensive and will take most/all of the budget if they are included in it.
The easiest would be to buy a potted strion bulb from Fivemega and NiMH D cells (CTA 12000mAh recommended). That should give you 116 lumens (according to brightguy.com). Runtime will be 6 hours.
I think I paid $6 for the strion bulb, but be warned, it has a very thight hotspot.
Another option is to use 4 NiMH C cells and use a 4.8V bulb like the WA1319. Some work with the spring and endcap has to be done with this mod, and you need to make some tubing to hold the batteries in place. The problem with this mod is to get decent potted bulbs, so you may consider getting one of
Kiu's bi-pin socket kit. However, you my try the Pelican Big-Ed rechargable bulb (this is potted), but the specifications are contradicting on it, I have seen it specified as 65, 78 and 163 lumens. After trying it and comparing it to other bulbs I had the feeling 163 was the correct spec. Using the Big-Ed bulb you should get 2.5 hours runtime with good cells.
There is also the option of using 9 AA NiMH batteries in 3 x
Elektrolumens 3AA-D holders ($3.5 each) and use a
WA1306 bulb togheter with the Kiu bi-pin socket kit. This setup should give you 350 lumens for 1.5 hour. I think this may be the most powerful setup you can use without melting the stock reflector and lens, but don't take my word for it since I have not tried it myself. Note that you should rest the batteries for an hour after charging when using this setup to avoid instantflashing the bulb. An alternative would be to use a dummy cell so you were only using 8 cells and ran the bulb at spec, but this will give you only 245 lumens, but the bulb will last longer.
Sigbjoern