nkresho
(nkresho)
4
If it’s the a1s, it looks like the side switch is built into the driver. You’d need another driver built like that to replace it. That’s problem number one.
Problem number two is the fact that it’s a single 18650. There isn’t a boost driver that will run a 12v LED on a 17mm board that I’ve seen yet. The KD drivers are 22mm and don’t have provisions for the switch.
Best bet is to get another atactical driver or possibly the sofirn sp32a driver. The sp32a looks pretty close to the a1s (has the switch on the driver). https://www.aliexpress.com/store/product/Sofirn-Flashlight-Driver-Circuit-Board-Anti-reverse-LED-Driver-Chip-SP32A-SP31-SP32/2933049_32859323105.html?spm=2114.12010612.8148356.12.444b11965vXDO4