I'll have to chip in with "I'm not an EE" as well, however it is
possible for a 12 volt battery to generate more voltage than it's
"label" indicates. Take for instance, a stun gun li
which regularly boasts a whopping 100,000 volt shock or more and it
certainly doesn't have a 100,000 volt battery inside. It
implements a voltage amplification circuit that can step up a 9 volt
source to between 100,000 and 500,000 volts. Now, I realize that
laptops generally don't include stun gun circuitry, however I just
wanted to make the point that a battery can generate significantly more
voltage than it's rated for, and that usually is a function of a power
fluctuation. If you run a current through a transformer with
unequal windings and then remove that current, a voltage is generated
through the secondary coil which exceeds the input voltage of the
primary coil. The key point is that the voltage is generated as a
result of stopping the current (disconnecting the battery). This is
called a "step up" transformer Y, turn it around and it becomes a "step down" transformer. Here are a couple of links for you "curious" types:
W
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RE: Another Boss-ism