Energizer 9V Rechargeable NIMH Battery

They are smaller than a normal 9V. For some reason they will not work.

Energizer Rechargeable 9V Battery is a great quality product! I like it so much better than the batteries you use once and throw away. This is so much better for the environment and it ends up costing people less money to purchase in the long run.

Mainly got this for my son's remote control car since we got through batteries like crazy because of his constant use this is definitely a money saver! Only downfall is having to get the charging base for it.

The last 9v battery you will ever need to buy for your smoke detector plug this state of the art bad boy in make sure sure to test your smoke detector like you normally would and just remember to charge it once in awhile and your good to go

Good quality for the price

It is so nice to have the reliability of an Energizer battery with the convenience of a rechargeable. We used this battery in our main smoke detector. We plan to buy more when we pick up a 9 volt charger. So far works great!

Batteries can be expensive so I love the fact that this battery is rechargeable. The battery is working great in my device and holding a charge without needing to be recharged as of yet. I did try to recharge just to make sure it would after some use and it works amazing.