Converting SL4 Xenon > LED?

[beekeeper5]

The R2 mod I use is this one.
Width: 26.5mm
Height: 29mm (without the included support spring)
Output: 117~225 Lumens (manufacturer rated)
Input Voltage Range: 3.7V~18V
Thanks

Are there any light output differences between 4.8V (4xAA rechargeables), 6V (4xAA alkaline) and 14.8V (4x18650 - does it even fit?)?

 

[inka]

Utilizing the Deal Extreme SKU 32953 with both an SL4 and SL6, after messing around a couple of days with a dremel tool, went to the hardware store today to find something to keep everything centered etc. Ran across some 7/8" x 1 3/8" machine spacers or shims or something to that effect in the bolts & nuts special drawers at Ace, for $0.45 each. 3 placed on the backside of the reflector centers it, pushes the face to the lens and connects the contacts. Works great, no machining or soldering, just lay them on and use !!
View attachment 77163 View attachment 77164 View attachment 77165

Can you measure the thickness of the 3 spacers all together ?I want to make just one.
Thanks

 

[bbcg59]

Can you measure the thickness of the 3 spacers all together ?I want to make just one.
Thanks

SL4 only needed 2, they measure 2mm using a clear ruler to measure, the 3 on the SL6 measure a hair more than 1mm each, I'd say 3.1mm by eye. But those may not be ideal YMMV

 

[bbcg59]

Are there any light output differences between 4.8V (4xAA rechargeables), 6V (4xAA alkaline) and 14.8V (4x18650 - does it even fit?)?

I got and used NiMH rechargable C cells at 1.2V each, so 4.8V vs 7.2V, for my SL4 and SL6 with no noticable difference underwater in output with an R5 module. So maybe voltage does not make that significant a difference ??

 

[inka]

SL4 only needed 2, they measure 2mm using a clear ruler to measure, the 3 on the SL6 measure a hair more than 1mm each, I'd say 3.1mm by eye. But those may not be ideal YMMV

Thank you

 

[havnmonkey]

Looks like I might be ordering an sl4 just for this mod! I'm already working on my 4C Nemo, probably gonna be 3x R5. This might even work on my 4aa Impact XL too!

Any heat issues with those that have had the mod for a while?

 

[Sirto]

Well, here's something I haven't seen discussed in regard to the SL4 mod. I just got the R5 module and used a split washer to center the module and make the connection. When I screwed the top on the light worked except that the switch does not turn it off. I need to unscrew it slightly to get the light to go off.

In investigating the reason for this I found that when the batteries are installed backwards the switch completes the circuit in both positions as confirmed by measuring voltage between the battery and the contact controlled by the switch. I found the same was true on my other SL4.
It seems that the shape/movement of the switch contact doesn't work with the flat (negative) side of the battery.

Anyone else experience this?

 

[jjblomquist]

Well, here's something I haven't seen discussed in regard to the SL4 mod. I just got the R5 module and used a split washer to center the module and make the connection. When I screwed the top on the light worked except that the switch does not turn it off. I need to unscrew it slightly to get the light to go off.

In investigating the reason for this I found that when the batteries are installed backwards the switch completes the circuit in both positions as confirmed by measuring voltage between the battery and the contact controlled by the switch. I found the same was true on my other SL4.
It seems that the shape/movement of the switch contact doesn't work with the flat (negative) side of the battery.

Anyone else experience this?

Try using Durecell Batteries they are more domed on the bottom not as flat. If your realy brave pull the switch apart and put a solider bump on the switch then put it back together.

 

[haibeis]

Sirto - in a nutshell - no i have not experienced this on either of my conversions.

just lucky i guess ;-0

 

[Sirto]

Try using Durecell Batteries they are more domed on the bottom not as flat. If your realy brave pull the switch apart and put a solider bump on the switch then put it back together.

Actually I was using Duracells but I switched to Energizers and now the switch works. Thanks.