Exactly what you expect them to be and do. I change the batteries in the smoke detectors yearly and these seem to last the whole year.

These batteries have a very good track record of service. I use them in smoke detectors and door openers.

We go through a ot of these batteries, only because of the volume of items that require them. They last a pretty long time.

I always buy energizer batteries because they are a great brand. Alot better than the generic it's worth the money

Great batteries slow coming. It took nearly two weeks to get these because of the weather in Texas- Really that's what they said !

I’m pleased with these. I put them in my smoke detectors every six months. The arrived in a day and the expiration date was far out.

They're batteries and out last Member's Mark by approximately the price difference making them no more expensive.

We prefer these batteries for our smoke alarms. Best value for a 2 year battery and they also have a 10 year shelf life!

I like to change my batteries on my clocks and smoke detectors. I always use Energizer batteries as they last a long time.

Three of the batteries tested at 0 volts and two more tested under 8 volts. Make sure you test each battery with a multimeter before you install.