I have these brand new Li-Ion cells that are rated for 3000mAh and I'm trying to get their actual capacity. I have a discharger and its max current it can draw is 2A. However when I set that and run the discharging process it typically never exceeds the range of 1.6 to 1.8A.
In one example I measured on average 1.7A draw for 46 minutes. This was set to stop at 3V. In the first 30 seconds at 1.6A the voltage drops from 4.2V to 3.7V.
This seems terrible for the 3Ah rating. If I'm pulling 1.7A that means in theory it should last 1.8 hours right?
Just trying to confirm if I'm thinking about this correctly. The charger/discharger is an iMax B6AC.
The full product "name" is:
EBL 3.7V Li-ion Rechargeable Batteries 3000mAh 18J Lithium Battery
Although I can't seem to find much about it.
I will do some lower current draw samples eg. 0.5A 1.0A and see how it goes. I guess this battery is made for toys/torches(flash light) not sure what kind of operating current is normal there.