I'm pretty new at this stuff in general but I'm trying to power a Luxeon C Lime colored LED (https://www.digikey.ca/en/products/detail/new-energy/LST1-01H07-LME1-01/10663118) using a CR123 battery.
I was testing it with my bench power supply, giving it 3.1V with a 0.2ohm resistor and things were going great and it was pulling around 700mA.
Switch over to the CR123 battery and I noticed it was a lot dimmer. Measured how much current it was pulling and it was something like 80mA! I tried removing the resistor and immediately when connected, it now pulls about 450mA but within seconds that drops to about 250mA and it slowly keeps going down from there. If I disconnect the battery and immediately measure the battery voltage its 2.9V. It was 3.2V before I connected it.
What's going on here? Why is it not pulling more current from the battery? I tried more than one battery in case it was that but same result.
I was testing it with my bench power supply, giving it 3.1V with a 0.2ohm resistor and things were going great and it was pulling around 700mA.
Switch over to the CR123 battery and I noticed it was a lot dimmer. Measured how much current it was pulling and it was something like 80mA! I tried removing the resistor and immediately when connected, it now pulls about 450mA but within seconds that drops to about 250mA and it slowly keeps going down from there. If I disconnect the battery and immediately measure the battery voltage its 2.9V. It was 3.2V before I connected it.
What's going on here? Why is it not pulling more current from the battery? I tried more than one battery in case it was that but same result.