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Johnny
Comentado en los Estados Unidos el 25 de marzo de 2024
They're very light which makes the device you put them in also much lighter. I use it in a TENS unit and I love how much lighter it is overall. Makes it easier to carry around and keep on my person.The batteries come with a short double ended charging cable so you can charge both batteries at the same time.
Dwardo
Comentado en los Estados Unidos el 2 de octubre de 2024
Bought these for my smoke detector, they work great!
jc
Comentado en los Estados Unidos el 5 de junio de 2023
Update: 6/19/24Will not even charge anymore. Very little use. Checked and charged monthly.Original:Maybe if you use a device that requires daily/constant use of a 9-volt battery, this might be the product for you; this point, recharging seems better suited than replacing.This was for a multimeter and laser temperature reader. They currently see limited use in my garage but need to be ready to use when called upon. Regular 9-volt batteries have always been dependable...except I have had a a recent run of leaking Duracell and Energizer batteries which prompted the switch.Charged both of them when I received them and put one to immediate use. No issues, worked for hours straight as I rewired a home alarm system.Kept one in the multimeter and one in the laser temperature reader. Just replaced the battery in my wife's vehicle and wanted to check with the multimeter and the 9-volt is dead. Same for the laser temperature reader. They have been sitting for about a month.
Yorarider
Comentado en los Estados Unidos el 29 de marzo de 2023
I bought these to use as backup power supplies for several Arduino projects I’m working on, which are primarily powered through a 5v USB. The Q&A stated they could be not used while being charge, but I’ve found the battery terminals maintain 9.15v even when charging. The projects I have draw about 22mA and I diverted 5v USB power to a USB-C port to charge the battery continuously. With the 9v terminals connected the Vin pin and the USB-C charger powered, the battery slowly charges at 20mA (dropping as it reaches full charge) then it begins to discharge at very slow rate (~7mA) for a period of about 20 minutes, then starts the cycle all over again. If I pull the main power supply to the project, 9v amperage kicks up to the full ~22mA and the Arduino processor continues to run uninterrupted. This works excellent as a temporary battery backup to survive brief power outages. I don’t know why the Q&A states it can’t be used while charging, possibly it will not work at higher current levels.I can’t speak for longevity of this product, since I’ve only been using these for a few months and knowing the chemistry of Li ion batteries I know that my use case (keeping the battery at full charge) speeds the degradation on these cells. I’ll update this at some point in the future if I experience a failure.
Corvettejohn86
Comentado en los Estados Unidos el 3 de octubre de 2023
I like this brand of Rechargeable Batteries. They are reasonably priced, good quality, long lasting, fast & easy to charge! This is the only brand I purchase and use now! I have these 9v, I have AA, and a bunch of the AAA! I've replaced all my old regular batteries with these! I highly recommend 👌🏻!
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