Voltage question - 4 battery operated soap dispenser to AC powered awesomeness
Last night I did the deed, actually really simple, I followed the general idea of this instructible, though my mod didn't include a double pole double through switch, I just took the batteries out and connected the AC charger's wires directly to the battery terminals.
Here's my question though:
While it works, its not quite as powerful as I though it would be, its actually a little weaker than it used to be when I had batteries with a fresh charge.
It originally had 4 batteries, so I used a 5V charger. I have another charger setting around, but its a 7V, do you guys think thats too much of a jump? Should I wait till I can find a 6V charger? Am I going about this the wrong way?
I really don't know anything about voltage, but the concept of converting this stationary item to AC seemed like a good idea and I'll really enjoy not having to replace the batteries all the time.
Thanks for any help!