(You should still take your batteries out of the charger within a day of charging them, though.)
AA and AAA compatibility: We considered only chargers that can charge both AA and AAA batteries, because both are fairly common types of rechargeable batteries.NiMH (nickel metal hydride) compatibility: We made sure the charger was compatible with NiMH batteries, which have the latest technology and are the most common AA batteries-NiCd (nickel cadmium), lithium, lead, and zinc rechargeable batteries are far less common.Best Black Friday Deals Still Available.