Long lasting power for all electronic devices you use the most! Use Energizer Recharge Rechargeable Batteries (sold separately) for flashlights, portable electronics, remotes, calculators, smoke alarms, door locks, cameras, wireless mice and keyboards, paper towel dispensers, battery-powered toys, and this charger to recharge them. Includes an automatic shut-off and an easy-to-read LCD screen that displays the charging status of the batteries inside. Can charge 4 AA batteries at a time.