AFTERPARTZ Autostart help jump-start device 14000mAh 400A for 12V batteries, 5V 2.1A USB & 12V output battery charger for laptop & phone & tablet, built-in LED lamp (electronic)
In principle, the JumpStarter is a fine thing! Unfortunately, I had bad luck with the battery, which was unable to keep the voltage and its capacity. A Li-Ion battery holds its voltage over a very long period of time, what I know of my cordless drill