Series vs Parallel Wiring

[infinite_loop]

What are the features (pros/cons or whatever) of running 2 7-Cell batteries in series? What about parallel?

(I'm running a 9918/9L, BTW)


What type of wiring is this (this is from one of the posts by SuperEmaxx):



And Don't know if you can see this, but this is how my current setup is. This is series, right?:



Thanks guys!