I tried the Fusion Gamer 6 pack of AA Alkaline batteries also. This particular “Advanced Alkaline” was sent specifically to test by the Brand and suited my personal products for long term use. I will be specific about a situation you do not want. I placed the Fusion Gamer (blue package) in an iHome charging speaker radio and the electric cord detached by accident. The battery drained down, as it was connected to something and therefore in charging mode. Even though this Fusion (red package) is another longer lasting type, the same type of situation can happen. I was able to transfer them over to a less demanding beauty rotating cleansing device and a massaging arm band, which I also tried for use with this type. To check the level of sound or power with the iHome- I connected a small simple old mp3 player and the new Amazon Fire tablet, but this time watched and observed for a short time with this tester. It is too soon to tell how long it will be equal to using electricity in this manner for music listening.
I also want these to be around for my Brother Label maker which does not have a power cord. It happens to be a high battery user or "Power Hungry" especially left in or working with it on. I do not have enough rechargeable batteries around to power it. In emergencies and electricity outages, or just inadequate places to charge those types, this option becomes necessary. Because batteries need the same capacity level and an 8 count often fulfills most needs, it is realistic to have them on hand. Unless, I drained both battery types and other brands the same way, it would be difficult to fully compare some qualities in a short time.
I have been familiar with the Brand and though not as available, the overall cost seems to still be less. I am going to start looking for the AAA size since that is what fits my small flashlight, wireless mouse, and more. These are often left on by mistake or used extensively and are essential to function at all times. I see the listing for digital cameras, high powered toys and grooming devices on the package. That may include some oral care/inter dental devices which may need batteries. These are listed as Rayovac’s longest lasting battery made in the USA.