Will this work on diesel engines?

Jump starter capacity is not specified for diesel applications. Diesel engines typically require higher cranking amps — verify the unit's peak amperage matches your vehicle's cold-crank specs before relying on it for diesel ignition.

How often do I need to recharge the unit itself?

That depends on how much you use the USB outputs and jump-start function. The 12000mAh cell holds a charge over time, but we recommend topping it off every few months if it sits idle in your vehicle.

What cables and clamps come with it?

Only the unit itself ships in the box. You'll need to source battery clamps and jumper cables separately — or confirm they're in the package before checkout if your listing says otherwise.