Do D batteries last longer than AAA batteries?

How long any cell lasts depends on the load it’s connected to. Batteries are rated for their current delivering capacity over time, or “amp hours”. D cells have less bulk (internal) resistance & can provide larger bursts of instantaneous current than C, AA or AAA cells can. A car battery can deliver 800-1000 amps of instantaneous current, but only for about 30 seconds.

Battery Data