If you tried a battery recharger a few years ago, and the batteries didn't work as well as non-rechargable batteries, try again! Batteries charged with this recharger work as well as what you're used to, and are far more efficient and less wasteful to use. They can be recharged 25 times or more! Includes car adapter and charger for NIMH batteries only. This charger doesn't do alkalines. AA or AAA or 9 volt only.