Need a little backup power for a modest amp install? The Shuriken SK-BT18 is a compact-size 12V AGM power cell rated at 500 W and 18 Ah, built to add a reserve of current for car audio amplifiers. Its sealed, non-spill construction lets it mount in any position.

Low internal resistance helps it respond to sudden current demand. Ring terminals and wiring are not listed as included, so plan those parts before installing.