Button cells are useful for all sorts of smaller or low-power devices, but are ones that are the same diameter, like a CR2025 and CR2032, interchangeable?

Just a quick question to see if there is any consensus amongst the Hive Mind on this… I have a Mid-2010 15" MBP (fixed battery) which acts as my main desktop machine, and is this hooked up to mains ...

Editor's Note: March 16, 2026: We've added a section answering some frequently asked questions related to purchasing a UPS backup at the end of this story, which we hope will help you figure out how ...