Uniquefire UF-2100 3-mode conversion to 5-modes

Thanks for adding the pics and tail cap measurements, Heke! It's truly an awesome mod and if anyone who has a 5-mode would be willing to look, I'm betting they can be converted to 3-mode (not that they'd want to). Definitely no need to pay more for the 5-mode as they are likely the same exact product.

I wanna convert mine to 3-mode... High, medium and low ;)

Looks like i'll probably mod mine when it comes in :)

Does anyone have a 1mode and can you do the same thing and make it a 3 or 5mode?

There is no drop in high mode current (could be as high as 4.4A on my Sanyo 2600, you need to push it hard into the spring) after modding from 3-mode to 5-mode.

can you just snip the leg of the chip ?

- Does anyone know about the kingston version of this light..kingston is the one replacing the uniquefire ..hopefully it's just a name change

How do you get the brass ring securely back on? It's hard.

There is a flat side and a curved side, which goes where?

awesome! the lack of medium was kind of annoying on the 3 mode..hi med low would be perfect but ill take the 5 mode for the medium..thanks so much for this!

Flat side goes against driver. I use a pair of smooth jawed slip-joint pliers to press the ring in place working my way around the pill a litle at a time until fully seated. Don’t press the ring fully from one spot or you will distort the ring. Think of it like tightening a head gasket or wheel on your car. If not tight against the driver it will not work reliably or at all.

I did it with my godzilla grip fingers. They still hurt.

Has someone tried to freeze it?


Probably putting it (the ring) in the freezer, for effect of the expansion with the heat and contraction with the cold, contract a bit

Anyone? Recently ordered this from DD and would like to know if it's the same.

Solarforce clip works with the UF-2100

First things first. How did you get it off?

I used the tip of a small pocket knife and worked in under enough to get a small gap. I then used a small screwdriver and twisted and poppedy it off. It’s not easy to get it started but once you manage to get a gap it’s cake from there.

I don’t have nail scissors. But I have small sharp iron nails. I wedge it in and it just easily popped of. Thanks JohnnyMac for the technique.

Hi, I just ordered a UF-2100. I notice that the processor has the same part number as the one pictured in the Trustfire R5-A3 Strobe delete thread (https://budgetlightforum.com/t/-/2179). I haven't got my light yet to look to see how close the rest of the board looks, but I was wondering if it looked like this mod might work for the UF-2100 as well?

Thanks,

Sorry I just reread my post and found it to be very ambiguous. When I said "if it looked like this mod might work for the UF-2100 as well?", what I meant was the strobe delete mod. The reason I ask is I noticed they are the same chip. It would appear that the chip is single time programmable from the datasheet I found while googling it. I wonder if all of the Chinese driver companies source it from the same place pre-programmed with the same pins controlling the same features and, thus, soldering it the same as in the R5-A3 strobe delete thread would leave us with a 3 mode (low, medium, high).

Thanks and sorry for my previous ambiguity.

Thanks for posting this, I was just fooling around tonight with my 2100 and was thinking that 5 modes sure would have been nice, and found this thread on the way to looking for a decent driver. Ten minutes later the leg is de-soldered and the light is back together with five modes. Thanks for saving me a few dollars on a new driver!

8)