Review on AUTOGEN Car Jump Starter 4500A 99.9WH With 12V Socket Portable Battery Charger Booster Pack, Jumper Pack With Intelligent Jumper Cables For (12.0 Liter Gas And Diesel) Heavy Duty Trucks Boats RVs by Zachary Caldwell

Indispensable for boats where getting a jump the traditional way is challenging at best. I have a 28 foot cruiser that had three large dead batteries. Would not start with all three even after charging overnight. I tried the AutoGen 4000 out of the box which indicated 80% charge. Hooked it up in "boost" mode and . NO GO! It wasn't really a fair test so I charged with wall adapter till full . about three hours. This time IT WORKED! Furthermore, the next day I tried it again without re-charging and with boat batteries removed . and IT WORKED!There are other similar products out there but this one had the most amp hours (reserve battery) . more important than raw cranking amps as that number can be misleading or depending on testing methods. It also is a lot cheaper than the NOCO . and comes with a very nice case. It does not indicate strength of battery trying to jump which is kind of a gimmick anyway. I plan to keep it in the boat and keep it plugged so it gets topped off whenever motor is running or on shore power. So far I'm satisfied. The next time I need it in an emergency . I'll be very satisfied