Rayverstar LR521 AG0 1.5V Alkaline (20-Batteries) Fits: 179, 379, SR63, JA, RW327, 618 (Full List Below)

Button cell batteries can be a pain to deal with, especially if they dont work very long for the device in which you use them. These batteries arrived free of corrosion and in a convenient package that allows you to eject the batteries through a perforation in the back of their packaging. I'm using them in Hot Toys collectible figures, which require more output than a watch for example. They're holding up longer than I expected and considerably longer than the button cells with which the figure comes. I will be reordering more of these in the future.

I bought a set of LR521/179 batteries to replace the ones in a small penlight. I read the battery type off the old ones, searched on Amazon, and quickly received Rayverstar back as the top match. The price was a good value, shipping was quick, and my order was fulfilled correctly. I had the correct replacement batteries in just a couple of days and my penlight shines brightly again. I am happy with Ravyerstar and I would buy again for future needs.

Idk how the longevity is bc I literally just received them but I'm very pleased so far. The value is incredible... Two at the grocery store would cost me double!

Can't speak to the longevity yet, as these were just received, but for the price, you can't beat it.Fast shipping.

Super great value for the money. Had no duds in the batteries. All work great. Definitely recommended

Decent batteries , decent price works well with what i need them for good valueWill buy again when needed

No complaints. Item arrived quickly. I can not comment on longevity as I have not installed any of the batteries yet.

When using these batteries, the items work. Had no problem with it so far. Do not know if it's longevity or battery life. Just started using it. But good for the value of money.