7.4v drop-in LED for Maglite 2D?

MixingWizard

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Sep 14, 2021
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Leeds
Hey all,

I'm looking to max out an old Maglite 2D but I'm having a bit of trouble finding the right parts. Ideally I'd like to upgrade the batteries to two 21700s and replace the bulb with an LED, but I'm struggling to find a 7.4v drop in - the ones designed for the 2D are all 3v as far as I can see.

I'm in the UK so the selection is a bit limited. If anyone has managed to find one please let me know!

Thanks,
MixingWizard
 

LEDphile

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Mar 8, 2021
Messages
215
The voltage from two 21700 cells will be between what you get from 4 and 6 alkaline cells, so any drop-in that is designed to work in both 4 and 6 cell lights should work for your application. I know that Malkoff has some appropriate drop-ins, although don't know about shipping to the UK (or when they will be back in stock)
 

MixingWizard

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Sep 14, 2021
Messages
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Leeds
The voltage from two 21700 cells will be between what you get from 4 and 6 alkaline cells, so any drop-in that is designed to work in both 4 and 6 cell lights should work for your application. I know that Malkoff has some appropriate drop-ins, although don't know about shipping to the UK (or when they will be back in stock)
Not sure why I didn't think of that! I'm assuming it's the same fitting?
 

xxo

Flashlight Enthusiast
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Apr 30, 2015
Messages
2,749
2 - 21700's are too long for a 2D Mag, unless you do some sort of spring mod like Matt Smith over at Lumencraft shows in his videos on yt for 26650's. you will need protected cells for safety.

BTW 2X protected 21700's work real well in a 3C Mag.

Most of the LED drop-ins rated for at least 3 cells will run fine on a single 26650 or 21700 in an adapter.
 

happychaps

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Jan 3, 2022
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London
There are quite a few different LED drop-ins on eBay and Amazon UK that work with 7.4v. Many are interchangeable between 2 to 6 D Maglites. They have electronics inside to regulate the current/voltage. You don't need to look for just a 2D drop-in as the bulb socket is the same size for all incandescent D cell sockets. So for example a 4 or 6 D Maglite drop in will fit in a 2 D Maglite.
 
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