4 Pack 300mAh Ni-MH Rechargeable 9 Volt Batteries with 9V Battery Charger

Works very well. Good Quality!

These aren't the longest lasting batteries but since they're rechargeable they still save money. I bought these for my smoke detectors and all the batteries drained after about a year; all within about 3 days of each other. I have a few of these batteries used elsewhere so once my detectors started chirping I pulled them from the non essential devices and charged then rotated them. I then set a reminder with Alexa to remind me to swap the batteries after 150 days; this should keep them from draining too much and extend the life.

This took a while to charge the batteries the first time, but the lights went out when they were done! That was a great feature. Great product, at a great price.

Works good and only last about half the time of a regular battery. Other than that I would give 4 stars

Wish they lasted a little longer. Doesn't quite last a full work day on one charge in my muscle stimulation machine.

UPDATE: Seller refunded, didn't get replacements but quick responds from seller.Charged all 4 batteries and all 4 were dead. Useless, had to recycle them and buy some Duracell. Waste of money.

Don’t waste your money on this product. I should have known better than to buy this off brand garbage. Batteries stay charged for maybe a day in a smoke alarm if all things. Which barely uses any energy from the battery. Outside of the life of the charge the charger is cheap and flimsy. Spend a couple of extra bucks and get something that will actually last/work.

price and simplicity .will use for my back stimulator unit