If the connection is proper, the light will turn solid green, and you can start an engine with 0% of battery capacity right away. ". TOPDON JS2000, When Getting Stuck is No Longer An Issue! It also serves as a backup 16000mAh power bank.
TOPDON 2000A 12V Lithium Jump Starter Super Safe Jumper Box 16000mAh Powerbank
NOCO Boost HD GB70 2000A 12V Lithium Jump Starter Battery Pack New No Box
TOPDON 2500A 12V Lithium Jump Starter Safe A+++ Jumper Box Battery Booster
TOPDON 2500A 12V Lithium Jump Starter Super Safe Jumper Box 16000mAh Powerbank
TOPDON JS2000 Jumper Box 2000A 12V Safe+++ Lithium Jump Starter Battery Charger
Topdon JS2000 Booster 2000A 12V Portable Lithium Jump Starter Safe Protect