Will these cables work on both 12V and 24V systems?

The 500 AMP rating covers standard 12-volt automotive and light truck systems. For heavy-duty 24V diesel applications, verify your specific system requirements before use.

Do the clamps stay secure during use, or do they slip?

Clamp design and grip strength are not detailed in the product specs — test the connection on a dead battery first to confirm they hold tight before relying on them for critical work.

Can I store these outside in a garage, or do they need special care?

Keep the cable coiled or hung in a dry location between uses. Copper wire corrodes if left wet; wipe dry after any moisture exposure and store indoors or under cover.