Datasheet - Panasonic Ncr21700t

Charge at 2500mA (0.5C) until the voltage reaches 4.2V.

Before diving into complex charts, here are the headline specifications as listed in the Panasonic NCR21700T technical datasheet: panasonic ncr21700t datasheet

Panasonic is very clear on this: The NCR21700T is designed for spot-welded nickel strips. Soldering irons transfer too much heat into the cell, melting the internal separator and causing an internal short. If you see a loose NCR21700T with solder blobs on it, run away. Charge at 2500mA (0