I've come upon some interesting cells locally, and I'm trying to find more information about them.
Some information I've gathered thus far:
Any input would be helpful.
Some information I've gathered thus far:
- Manufactured by LG Chem. Tagged as "Ebike" cells so maybe they are NMC chemistry.
- I'm guessing they are about 5+ years old, but are still in their factory packaging. Cell voltages are 3.7V to 3.8V which seems right for storage.
- The first few discharges have been around 8.5Ah. I was expecting capacity to be higher based on size/weight, like 10+. Will they get better with more cycles?
- 240g, 7x93x185 mm (about 30% larger than a dollar)tabs are 20x15x0.25mm
- Positive tab is aluminum so spot welding or special solder/flux is required.
- internal resistance when charged is about 15mOhms.
- Based on my limited testings, the Energy Density is 130W-hr/kg. That would put these at the lower end of the spectrum for their chemistry.
Any input would be helpful.