/diy/ - Do It Yourself

Question for electronics bros. I recently started learning about circuits and troubleshooting since I would like to purchase some old consoles and fix them up. One of the tools I recently purchased is an auto-ranging digital multimeter.

To test it, I've set the meter to voltage and selected DC. I opened a package of AA 1.5v batteries and tested one, positive test probe to positive terminal and negative test probe to negative. The result was 1.563v, excellent read, battery is clearly charged. I then tested a battery from my audio system remote and got the result 1.494v, makes sense, the batteries in that remote have been used for a while now.

Here's where I'm scratching my head:

I have an Xbox 360 wireless controller that uses 1.5v AA batteries. I haven't used that controller in about 3 years but out of curiosity, I decided to test the batteries. There was no sign of corrosion on either the batteries or the contacts in the battery holder so I went ahead and tested them. The result was 126.8v.

What gives? The batteries are just disposable Energizer AA rated at 1.5v and they haven't been used in around 3 years. Anybody have any ideas? Google and Jewtube have been no help in figuring this out.