Rechargeable batteries are available in a variety of sizes, such as AAA, AA and D. They can be used in several common household products, such as toys, cameras, camcorders and power tools. When the batteries die, instead of being discarded like alkaline batteries, they can be recharged using a rechargeable battery charger. Prior to being recharged, AA batteries should be checked for signs of damage. If a rechargeable battery is faulty, it should not be used or recharged.
Inspect the battery terminals, or +/- ends, of the rechargeable batteries. The terminals of the battery are the most common sites of leaking or corrosion. If leaking or corrosion is visible, immediately discard the batteries.
Feel and examine the body of the battery. If you notice or feel any large dings, dents or lumps, discard the battery. A large dent or bump can indicate the battery cells inside the rechargeable battery are damaged.
Examine the entire battery for signs of leakage, corrosion or rusting and discard if you find any. A leaking battery may leave behind a slightly watery or sticky reside on your fingers. A corroded battery will have a visible green or white powder, while a rusty battery will have rust, or an orange-red colour, anywhere on the battery.
Charge the batteries using a AA battery recharger for the type of rechargeable batteries you own. The most common types of AA rechargeable batteries are NiMH, NiCD and Li-Ion batteries. If they do not recharge, discard them.
Do not attempt to revive or fix dead rechargeable AA batteries.