Electric Boat Forum
Inside Schumacher 12v Charger - Printable Version

+- Electric Boat Forum (http://www.electric-boat-forum.com/forum)
+-- Forum: Electric Boat Forums (http://www.electric-boat-forum.com/forum/forumdisplay.php?fid=1)
+--- Forum: Technical Topics - Batteries, Chargers, Motors, Controllers (http://www.electric-boat-forum.com/forum/forumdisplay.php?fid=4)
+--- Thread: Inside Schumacher 12v Charger (/showthread.php?tid=8)

Inside Schumacher 12v Charger - jackb - 12-21-2014

Thought it would be interesting to show the inside of a brand-name Schumacher 6v-12v charger.
Here is the charger:


Here is the inside:


You will see that this charger is really nothing more than a transformer.
It has a 6v-12v-6v switch that selects which 120vac winding is used.
The output winding goes to a rectifier, that connects to a resettable fuse.
I would guess the rectifier is a single diode, so the output is only a half-wave.
It doesn't have any capacitor at all, so the DC output is going to have pretty massive ripple in the output voltage and current.  

This charger barely works for a lead-acid battery.  
For a Lithium battery?  Almost assured death.