REV Power Pack CR2032 3V Lithium Coin Cell Battery
Results of our analysis:
We analyzed 120,232 reviews for 425 products in the 3V Batteries category.
We then analyzed 60 reviews for this product. Of these, 3 reviews were recent.
Around 67% of reviews were positive and about 33% were negative.
Final Score:

8.71 out of 10, based on these factors:
What buyers say about REV Power Pack CR2032 3V Lithium Coin Cell Battery
I found this one because I had the backup battery that worked, but it is dead, so I need to get the right battery.
These batteries are rated at 220 mah and should last a long time, as they are free of mercury, cadmium and lead.
Good quality and good value, I like how easy it is to pop out one battery at a time and not lose track of the rest.
I keep a few of these batteries in my case so I can swap them out if my tuner dies or someone else turns up with a dead one.
I found these batteries to be much more reasonable than the ones I would have found at a store.