Ok so I got tired of changing batteries in my off board battery holder. Updated all my WPC, System 11 and Bally MPU's to CR2032 holder
and battery. This mpu is from my Medieval Madness. Hope this helps someone out there.

WPC_(resized).JPG

See the wire jumper starting from the right to the very left? That basically ties all the negative points together to the upper right hand
side positive. Follow the exact orientation of of the CR2032 holder and the wire jumper.

There is no blocking diode on WPC games. The blocking diode is only necessary on bally mpu boards which charge a nicad battery. Look closely at the photo, install exactly as I have done and you'll be fine.

Battery holder source.. yes. Ebay.. CR2032 holder. You can buy them in bulk for pennies. CR2032 power cells? Also, ebay and very cheap.

This is exactly why I went with CR2032 batteries. The holders are cheap as are the batteries which can be bought in bulk. I have a CR2032
installed in my black knight for 4 years now with no issues whatsoever. I decided to convert all and be done with changing batteries every year.
I think many of you can appreciate not thinking about the batteries any longer. It is true, when the voltage drops, it just drops just like on a
computer.

Here are some helpful ebay links:

CR2032 sockets:

ebay.com link: 100 pcs CR2025 CR2032 Computer Coin Button Cell Battery Box Socket Holder Case

Batteries:

ebay.com link: 100 PCS CR2032 Lithium Battery 3V Button Cell for Digital Scales remote controls

For batteries I go with the cheapies. But you can always buy a Energizer or Duracell relatively cheap.

Good info. Thanks for that one.

Yes. They generally do not leak, are easy to change and you do not have to spend money on changing AA batteries on a yearly basis for no
reason.