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The 9 volt batteries by Panasonic are a good value. The date on the bottom is 5-2023 so I assume they are good until then if I don't use them before. I don't know how long they will last but usually up to a year in a smoke detector. I bought a 4 pack because I have two smoke detectors and the two remaining batteries are my back up just in case the ones I use last a year or more. i believe these batteries are worth the price since I've bought other brands at retail stores for almost double the price of these and I've used this brand in the past.
Verified purchase: Yes | Condition: New
When the batteries arrived I was impressed that they were of the Panasonic brand. When I bought my 1990 Honda Accord EX it came with a Panasonic battery and it lasted longer than any other car battery that I ever had, including the great old Sears Die Hard. So far I have only used one of these 9V batteries, but I tested it before installing it. It showed a higher charge than most on my meter. I am so pleased that the outside keypad for my garage door opener works again.
Verified purchase: Yes | Condition: New
These are perfect for replacement batteries for smoke detectors. Using more expensive batteries in smoke detectors usually results in uneven expiration. That means that the batteries fail at uneven periods and you end up doing the smoke detectors at different times. By using these inexpensive batteries, you can replace all of them at once (upon the failure of the first one in the house). You don't feel bad about discarding an expensive battery that may not be fully depleted. I replace all of them after one fails instead of one at a time. Most of my smoke detectors are affixed to high ceilings and it is a pain to bring in a 10 foot ladder multiple times.
Verified purchase: Yes | Condition: New
all good
Verified purchase: Yes | Condition: New
Great price, name brand.
Verified purchase: Yes | Condition: New
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