I'm new to the world of Li-Ion batteries.
So today I got a bunch of 18650 batteries. When I unpacked them, the voltage on each of them was 3.5V.
Since I want to charge them to 4.1V - 4.2V, and I don't have a dedicated battery charger, I'm using my bench power supply for the trick. I've read the theory, set up my power supply to CV 4.2V and CC 0.6A
When I connect the battery to the supply, at 4.2V the battery is draining only 400mA.
I was hoping it will hit the CC immediately, instead now that the battery voltage is 3.7V it's draining only 0.300mA.
specs: Max. charge current: 4A (Ambient 25°C)
I can get 1A of current if I increase the voltage to more then 5V, but I guess that's not smart.
What could be the problem? Any thoughts ?