I am doing something on my TK70 too, it should work fine with 8.4v.
You need to know your flashlight working voltage. And then make dummy battery contact to extend 18650 or 26650 batteries length. I will use neodymium magnet to be dummy contact.
I have no idea about voltage on either flashlight. I am new to flashlight collecting so I wanted to do a project for myself. All I do know is the 4 C cell is from Costco in store right now. The 4 D cell is the Stansport Tactical one.
Any detailed help would be appreciated. Thanks for all replies.
Yes, all are connected in session. Similar to Maglite. The only reason I am doing the mods is to transform to recharged batteries. The recharge C and D (regular ) (recharge ) cells take to long to recharge and much harder to find than 18650 batteries.
there should be no problem converting the light to work with 18650, you will need a new driver. i have a feeling your light is same as defiant lights home depot sells. they rely on alkalines cells voltage sag, and use either linear driver, or no driver at all, the board is PWM dimmer.
Yes, they use Alkalines for sure. Will new driver cost much? The reason I ask is because it expensive to mod I will scratch project. I would rather use money to get better or higher grade flashlight. Thanks for reply.
This mod probable will not save you money. A mod like this would be for the fun of the project only. You most definitely can find a suitable new flashligt that is smaller, cheaper and more practical than your proposed mod. But hey, guys do these mods all the time as they are a fun change, give experience, and gain knowledge. So if you are interested, by all means, Go For It!
Yes, true. I only wanted to mod these lights to 18650 because I will buy Nitecore Tiny Monster, Klarus, Olight or compatible. I know these use 18650 so it would be nice to have all batteries the same time.
to answer that i’d have to see how the light is made, if you could take it apart, as much as you can, and post pics we’d know better what driver can fit, and work. it could be anywhere from 5 bucks, depending where you are, to up to 50
well 50 is what very good drivers cost. you may be able to get away with simple linear driver for 5, but you’ll have to use either 1 cell, (with will give you shorter run time than 4 d cells. 4d cells 6v 10ah, 1 18650 4v 3,4ah, i’m not even gonna convert to watts hour, we can see already D cells have more energy), or make a holder that would take 2 or 3 cells and have them connected in parallel.
but unless you really want to do the mod for the sake of doing it, get another light, get convoy c8 for 25-30 bucks. quality wise they are no worst than brands you mentioned, convoys may not have as many bells and whistles, but they are quality build lights that follow KISS concept