[Batteries] New Rayovac 675 Implant model's a hoax?

[olspookishmagus]

Hello.

I've recently visited my local store that sells batteries and I've been introduced to a new brand of Rayovac's 675 batteries bearing a new sticker that read: IMPLANT.

I was told that they cost double the price but they last double the time. Beside on being suspicious of being tricked I was also curious so I bought them.

Now time will show, but until then... has anyone came up to them? Care to share your thoughts? Provide feedback?

Thanks in advance for your time and attention.