Hi guys, im an absolute noob when it comes to the internal parts of a flashlight.
I was wondering if its possible to modify a 5 mode flashlight to a 1 mode flashlight
I have a cheap ultrafire C10 5 mode flashlight and im sick of the annoying low,SOS and strobe settings. I just want High and OFF !
Possible ? or am I just dreaming ?
Thanks
Wade
It’s beyond my abilities, but I believe it’s possible depending on the driver. One driver I saw had 5 contact points, each one represented a mode and you only keep connections to the modes you’d want. (Unsolder? Or cut?)
I’m sure a guru will be on with a better answer for you 
It is often possible, search forum this question has appeared further.
Often only one small device a capacitor to hold the charge for the controller can be desoldered or shorted to achieve one mode.
Make a picture of the driver…
Usually this change can be done easily. It really depends on the driver. As Werner mentioned, a picture of the driver will likely be enough to figure out a fix.
Ok, not sure if this is what u guys were after but heres what I think you want to see.
Let me know if I need to take pics of anything else
Thanks !
Try to desolder the brown rectangular device in the bottom left corner…
Do you mean this part here ? just remove it completely ?
Ill give it a go
Yes that’s a capacitor, he holds the charge for some seconds after switching off so that the controller can switch to the next mode. Without it, it instantly forgets which mode it was after switching off and switches on in high mode…so it’s a single mode driver
This doesn’t work on drivers which remember there modes per software.
Ok I cut that part out with a knife. I think it may have had something to do with the memory. Its still got 5 modes but always diverts back to high beam when you turn it off and back on again, Which is great because I only want high mode.
Any other suggestions to convert to 1 mode ?
If you have a soldering iron, you could convert it to direct drive by moving the white wire to the outer ring (ground). One easy spot is on the right side of the chip named K24C02.
By going direct drive, the output is likely to increase. Since the driver has no control anymore, it will have only one mode.
I see. Would that damage anything though ?
also, could I plz trouble you to mark on my photo where you think I should solder the white wire ?
your input is much appreciated
Sure, Here you go. All four pins on the chip are connected to Ground. Moving the wire here will bypass the driver, making this true direct drive, one mode. Hopefully there is enough resistance in wires and springs to keep current at reasonable levels (probably). Happy modding!
Just for Info if the driver has a Low Voltage cutoff then bypassing the Controller for a direct Drive will disable this Function.
That is an important point Werner. 
For this driver it is not an issue, there is no voltage monitor on it.
Ok thanks guys. So, im still moving the white wire as directed by Relic38 ?
Sorry, I have no idea about this stuff and dont even know what any of this stuff looks like :8)
If you want one mode, and potentially higher output, the wire move is the way to go.
Awesome thread!
Great info. Tagged because I have several lights I want to do this to.
Thanks heaps for the replies.
I have a few days off now so ill give it a crack and let u know how I go.
Thanks !
Ok, good news !
I have re located the white wire as relic38 suggested and my light is now 1 mode as I hoped !
Thanks alot for the tips guys.
My soldering is pretty dodgy though so how do you guys make a clean joint with such tight room to move ?
My soldering iron only seems to melt solder half way down the tip of the iron. So I have to hold it on an angle to melt the solder, making it hard to get into a tight spot as the tip of the iron doesnt do anything at all.