Review on AUTOGEN Car Jump Starter 3000A 24000Mah Portable 12V Jump Box Car Battery Booster Pack For Up To 10.0L Gas And Diesel Engine With USB QC3.0 Smart Jumper Cable For Car Truck IP65 by Tom Lantz

Jumpstarted my stubborn boat literally 8 times on a charge and it wasn't even down to 50% after that. I have a Volvo 8.1 375hp motor. This booster pack is literally kept in my boat or my truck as a backup. Bonus to use it for charging damn near everything. The only thing that could make it better is an adapter to be able to jump start a boat via the boat's 12V receptacle. For older boats, you can't always get in the engine compartment.