battery/driver for 2D M@g P7??

[rjwpavo]

I'm wanting to upgrade my old 2D mag from the Terralux drop in to a P7 setup. You folks and your beamshots . I have a good amount of AA eneloops and alky C and D cells. What's the best way to power a P7 and with what driver in a 2D M@g? Preferrably 1 mode regulated. Estimated runtimes? Benefits/negatives of either power source? Right now the light has the 3C mod in it....

Would I be better off using a 3D as a host?

 

[starburst]

I'm direct driving a CSWOI - P7 in a 2D cell with three NIMH rechargable C cell's

It's doing OK

IT get's kinda warm after 5 to 10 min run's with fresh
charged cell's. I'm also looking around for some sort of driver for P7 mod.

 

[rjwpavo]

I know KD sells a driver for the P7:

Dimensions:

- Current regulated at 2.8A
- Gives 1+ hour current regulated (2.8A) output with four Eneloop AA
- Gives 3+ hours current regulated (2.8A) output with single protected KD 32650
- Measures 17mm in diameter, and 6mm in height
- Single light mode only
- Designed for SSC P7 LED for maximum output 740lumen-900lumens (C bin)
- 1xVin+, 1xVin-, 1xLED+, 1xLED-
- Prewired, ready to use
- Custom made only, ships in 3-5 days upon ordering
- Input voltage 2.7V-6.0V, buck circuit

I suppose this would work for a 3V setup, but the 2D's would dip below 3V pretty quick I imagine. Not sure abou the 3C setup. Seems eneloops are a better fit for the loads seen with a P7.

 

[darkzero]

I know KD sells a driver for the P7:

Dimensions:

- Current regulated at 2.8A
- Gives 1+ hour current regulated (2.8A) output with four Eneloop AA
- Gives 3+ hours current regulated (2.8A) output with single protected KD 32650
- Measures 17mm in diameter, and 6mm in height
- Single light mode only
- Designed for SSC P7 LED for maximum output 740lumen-900lumens (C bin)
- 1xVin+, 1xVin-, 1xLED+, 1xLED-
- Prewired, ready to use
- Custom made only, ships in 3-5 days upon ordering
- Input voltage 2.7V-6.0V, buck circuit

I suppose this would work for a 3V setup, but the 2D's would dip below 3V pretty quick I imagine. Not sure abou the 3C setup. Seems eneloops are a better fit for the loads seen with a P7.

You'll need to run 4x NiMhs to close to 2.8A. 3x NiMhs won't do.

 

[FredM]

You'll need to run 4x NiMhs to close to 2.8A. 3x NiMhs won't do.

because of the driver board? How many volts are needed to hold 2.8A?

 

[rjwpavo]

In series, right? Or we talking parallel? Just to make sure I'm on the same page...

 

[Norm]

Series

 

[spencer]

There is a 5 mode DIY driver here. I am really considering this with 2 D cell Li-ion in parallel.

 

[shakeylegs]

There is a 5 mode DIY driver here. I am really considering this with 2 D cell Li-ion in parallel.

This is a simple and very servicable solution. Reportedly will take 6v max but most efficient between 3.5 and 4.5V.

 

[rizky_p]

There is a 5 mode DIY driver here. I am really considering this with 2 D cell Li-ion in parallel.

+1

I am currently using 5AA and it doesnt hold very long at 2.8A. I tried 2x18650 and it stay nicely, 2xD lithium should good.

 

[rjwpavo]

Using the 5 mode driver mentioned above, how much runtime/current can one expect with C size alky's? I'm trying to keep it simple with the alkys, ie. the persistance with the questions, but I may have to get a set up for C/D Nimh. The other option is to just do a P4 setup...

 

[darkzero]

Alkalines won't deliver enough power for the rated current of that board.

 

[rjwpavo]

Thanks darkzero and the rest of yall for the info. Guess I'll have to rethink my approach.

 

[spencer]

It would be easy to just go out and buy some NiMH.

 

[rjwpavo]

I've been thinking...how about 2 of AW's "C" cells Li-ion in parallel? Ought to be enough for 2 hours of runtime right? I could devise a holder/adapter which should give me some room on the 2D body. If I could get this setup to work, it should be great for runtime I would think. Comments??

 

[darkzero]

I've been thinking...how about 2 of AW's "C" cells Li-ion in parallel? Ought to be enough for 2 hours of runtime right? I could devise a holder/adapter which should give me some room on the 2D body. If I could get this setup to work, it should be great for runtime I would think. Comments??

Running two in parallel will give you more capacity but still will not provide enough voltage for 8xAMC7135 to deliver 2.8A. I could only get 2.5-2.6A max using 1 C Lion or two in parallel. With two in series I did get 2.8A but the board got very hot very quick. For some reason using 2 C li-ions in series with 10xAMC7135 I could not get over 3A but with 4x C4500 NiMhs I got 3.3A. :thinking:

I don't like using these boards for P7 anymore.

 

[Norm]

With two in series I did get 2.8A but the board got very hot very quick. For some reason using 2 C li-ions in series with 10xAMC7135 I could not get over 3A but with 4x C4500 NiMhs I got 3.3A. :thinking:

I don't like using these boards for P7 anymore.

Isn't the max V for an AMC7135 only 6V, so 4 X NiMhs is fine but 2 X Li-ion is a no no.
Norm

 

[rizky_p]

Running two in parallel will give you more capacity but still will not provide enough voltage for 8xAMC7135 to deliver 2.8A. I could only get 2.5-2.6A max using 1 C Lion or two in parallel. With two in series I did get 2.8A but the board got very hot very quick. For some reason using 2 C li-ions in series with 10xAMC7135 I could not get over 3A but with 4x C4500 NiMhs I got 3.3A. :thinking:

I don't like using these boards for P7 anymore.

the later you mean without the AMC 7135 driver?