One morning, its owner, a hobbyist named Elias, brought in a dead cordless drill. Its battery was so drained the "smart" charger refused to even recognize it. Elias tapped the on the ZK-5KX. The display flashed 12.00V . He turned the knob until it hit 14.4V , then limited the current to 1.000A to keep things safe.
Some models require you to short the “RST” pad to GND during power-on. Zk-5kx Manual