Pinball Repair - Memory Capacitor 

Dave removes a perfectly good, 40-year-old rechargeable battery from a 1983 Vector pinball machine, and replaces it with a memory capacitor.
0:00 Introduction
0:13 Memory capacitor description
1:18 Comparison, Star Trek vs. Vector
2:27 Inside the Vector backbox. Original boards, original rechargeable battery!
3:12 The problem with battery backup
5:20 Solution for the Star Trek
5:58 Expensive and inexpensive options
6:32 The memory capacitor option
7:11 The Vector MPU board
7:57 Testing for negative vs. positive on the capacitor
9:02 Planning the project
9:27 Remove the old battery
10:06 Drilling a hole for the positive lead
11:35 Soldering the negative lead to the board
12:32 Wiring the positive lead to the board
14:04 Testing in the pinball machine
14:35 BEFORE YOU START!
15:00 Tests performed
16:08 Game play