Once upon a time a friend and I were working on a steampunk setting. This is something from those notes that I came up with that may be worth sharing.
TESLA GUNS
There are two sizes available for use.
First is the pistol version, light weight, more portable but only
delivers a moderate 'hit' of electricity. Second is the rifle
version, much heavier, very obvious but on the damage end it packs a
wallop. Rumors of larger guns abound, usually claimed to be attached
to zeppelins or trains for massive amounts of damage.
Charges.
Crank charges. Pistols are the ones
that usually come with this option. Since they use less electricity
per shot a single blast can be cranked up rather quickly.
Battery charges. Both the pistol and
rifle use this. Each battery provides a single shot but the sizes
are different. In a pistol they about the size of a AA battery and
loaded into a copper cylinder on the gun. Based on model they may
hold anywhere between one to four rounds. On a rifle they are about
the size of a Pringles can and mostly hold one round although there
are some newer version that hold two. It's also common to see a
rifle team where one person fires the weapon while the other carries
the batteries.
Wireless charges. Only the rifle has
the receivers equipped to use this mounted along their barrels. The
New Science Guild has set up the ground in areas they control to
transmit electricity without the use of wires. Usually used to power
the lighting, radio and other devices. The rifle can pull from this
also and is quite spectacular when used as you can see the electric
arc from the ground and into the rifle and then fired at the target.
This ability alone has led others to reason that fighting the New
Science Guild on their own ground is futile and suicidal.