Hooked it on the 12V power supply and on the LED and it works. Nice 30V output and bright light.
Hooked it on the batteries. Batteries give 12.4V. Switched it on. LED flashed again, voltage output on the booster drops from 30 to 12V and stays on a steady 12V.
On the battery side it still kept the 12.4V
So I guess the batteries are empty after all? I assumed seeing as the charger was 12.6V they are connected in 3S
Cant see the wiring due to the shrinkwrap around the batteries. It’s 2 rows of 6 batteries. But with 18650 range of 3.7 empty to 4.2 full, empty should be 11.1V and full 12.6. So with constant measurements above 12V I figured it should be able to power the LED.
Charger also said full batteries all the time, until I drained them. But it’s an 1A charger, and it charged for over an hour, despite draining them only 500mAh. I went to bed after posting my previous message so didn’t want to leave it charging.
And today I noticed that when I twist and turn the plug (already tried that before opening everything, but didn’t do anything back then) the charger goes from full to charging. So it looks like I got a bad connection, or messed something up replacing it. Although I can’t figure why it worked for 2 days. Plus when I replaced the connector, I also did a full charge to see if it worked.
Also replaced connector in a second light he had and that one is still working as it should.
Any insights on where my thinking process about the voltage goes wrong? Or am I missing something else?