Lambretta 12 volt, battery capacitor (25v 33000uf)

12 volt DC  Capacitors can replace a battery.

This is a 33000uf version is ideal for most Lambretta DC electronic systems.

Fit them instead of a battery on a DC electronic system, theses store and stablise DC energy and only work when the engine is running, saves on the hassle of a battery and is smaller and lighter. 

Arrows marked on the side is earth terminal, + positive is marked on the other terminal.

You can find a wiring diagram here