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How about usage.It varies, but in these new fangled transmitters, about 3 weeks. Why. I love batteries. Remember to switch OFF the power on regulator.[to save power, and save money].Anyway it's a good life being a battery head. No idea.I have AAA, AA, 9volt, lithiums, alkalines etcetra.Batteries for cameras, cell phones, remotes and radio control.I'm a battery head.Some years ago I came across the ProCell series from Duracell.Yes, they have up to 7 years shelf life. Well anything can happenin seven years. Makes you feel as ifthere is a purpose in life. Beats listening to Judas Priest.[Pleaseno comments in the comment box, it's a joke].Always.listen to the sound of Duracell.sweet music.
I've used these batteries for a while now with no problems. The price is right and the shipping is fast.
I agree with jetpower. After two years at home (shelf life dated 2011), the remaining batteries were dead. Have they improved. They were okay for the wireless microphones, because forgetting to turn off the mics didn't really test the longevity of them. I have a Duracell Ultra in my bedroom smoke detector, it's been in there for about two years and is still running strong. I'd probably buy them again for that reason + the low price. These seem like a killer deal, but the performance is terrible.About 3 years ago, I bought two packs of 12, one to keep around the house for smoke detectors and other devices, and a pack to use at church in our wireless microphones. They come with plastic caps attached, so I know they didn't short out and discharge themselves.Keep in mind, this was quite some time back.
But for home use, they just didn't last. Smoke detectors lasted about 4 months before chirping when the batteries were newer. Not likely, but possible. But these ProCells, and my poor experience with AA rechargables from Duracell, have seriously weakened my resolve to buy their brand in the future.I hope my experience is useful in your decision making process.
These batteries are great for the price. No need to buy the more expensive ones.
As noted in my review of another Duracell product: Batteries should greatly improve as new technology is developed and applied. Meanwhile, Duracell batteries do the job. Better (longer lasting) products are on the market in Europe, however, as long as buyers choose cheaper products over cost effective alternatives, I'm not looking for longer lasting batteries around here - because that would cut into earnings and profits.
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