wa1185 maglite 6d

[NotBrightNuf]

Im thinking about grouping two serial connected packs of 9aa into parallel in order to get just 10.8v for a total of 18aa batteries then put them in my maglite 6d in order to get a longer runtime powering the wa1185 instead of using just 9aa batteries to power a wa1185 in a maglite 3d. Would this work or would the runtime be the same?

 

[Helmut.G]

There's a subforum for incandescent lights only, I think your post belongs there rather than the general forum.
I don't know if its easy to do technically but yes, if you use two packs in parallel the bulb will be driven slightly harder and the runtime will be much longer.
I'm not sure whether the bulb is going to survive this though. is more likely because two stacks of batteries can give more current than one.

 

[choaticwhisper]

I guess I will tell you before everybody else does.

Best place to post would have been Incandescent Forum

Dont repost there, Just pm a mod ask to move.

 

[DM51]

Helmut.G and choaticwhisper are right - this belongs in the Incan forum. I'm moving the thread now.

 

[Illum]

I'm not sure whether the bulb is going to survive this though. is more likely because two stacks of batteries can give more current than one.

Depending on how small the linear resistance in your light has, the lamp may or may not go . Sometimes the 1185 is saved by the voltage sag due to high current draw, but that current draw will be halved if you use two sets of cells



the maglite's stock lamp tower will begin to melt after 30 minutes running the 1185. So I suggest using a AW mag tower instead, see if you can locate one with the soft start function but single mode.

While it does sound plausible I have no idea how you would go about designing the battery assembly.

I once had the same idea with the ROP [my pre1185 times] using 18AAs in 6S3P configuration...which gives me 7.2V 6AH to work with compared to the original 7.2V 2AH...but the project was cocooned when a lamp tower melted:laughing:

 

[R@ndom]

2/3d's will work. Most of the time you won't run a mag85 for half a hour.

 

[apete2]

would 9 sub cs fit?

 

[fivemega]

Im thinking about grouping two serial connected packs of 9aa into parallel in order to get just 10.8v for a total of 18aa batteries then put them in my maglite 6d in order to get a longer runtime powering the wa1185 instead of using just 9aa batteries to power a wa1185 in a maglite 3d. Would this work or would the runtime be the same?

Possible to make such an adapter but obviously will cost more. and you will get little more than double the run time.
I have done continuous run time test in this flashlight with FM3-H using 18 Sanyo2300mAh AA (9S/2P) with potted WA1185 and got little over 75 minutes on first charge, 27 hours rest time.
No melting or deformation sign in plastic parts of M*g switch.
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I'm not sure whether the bulb is going to survive this though. is more likely because two stacks of batteries can give more current than one.

Possibility of poof is more likely because of hot batteries without resting and settle down batteries. Lowering resistance is another reason to poof.
Hot off the charger 9AA may poof an WA1185 while 9S/2P well rested set up will not poof.
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the maglite's stock lamp tower will begin to melt after 30 minutes running the 1185.

This is not correct statement but this is:
the maglite's stock lamp tower MAY begin to melt after 30 minutes running the 1185.
There are many factors such as environment temperature, bulb temperature under load, size and efficiency of head heat sinking, voltage drop of batteries after 15 minutes, 20 minutes and...
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While it does sound plausible I have no idea how you would go about designing the battery assembly.

Yes, it is possible but why pay for such an expensive adapter and using extra long 6D flashlight while you can go with 3S/3P 17670 similar to this but in 4D tri bored M*g. This is 120mm shorter with same amount of energy and run time.
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2/3d's will work. Most of the time you won't run a mag85 for half a hour.

Some people prefer to use same flashlight without recharging for longer than half hour in total when they are out of town for several days and nothing wrong with that. I respect everybody's preference.
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would 9 sub cs fit?

Short answer is: NO
Unless you modify switch and tail cap or add an extension tube.
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Another way to get some extra run time in 3D M*g running WA1185 is serial 12AA in quad bored 3D M*g with voltage regulator.
Do not direct drive WA1185 with 12 serial AAs