11.1v help
 

How do I know if my esc can handle a 11.1v pack vs. a 7.4?? I am looking into a tekin fx-r. I have an lrp a1 I think in it now with no lipo shut off.

http://www.teamtekin.com/manuals/FXManual.pdf
Look in the Specifications section.

The Tekin FX-R will accomodate a 3S (11.1v) Lipo if you are running a single 35 turn motor or higher. Anything lower than 35T, or dual servos like a dig set up or rear steer, then you'll need to run a BEC as well.

Your current ESC, the LRP AI can't handle a 3s lipo. You could run a 2s 7.4v lipo, but I don't know if it has a lipo cutoff built-in.

I highly recommend the Tekin FX-R "thumbsup"

Not trying to sound totally stupid but is it as simple as 2 cell is 7.4 and 3 cell is 11.1? If so, I apologize for my stupidity. lol

correct..if your esc can handle a 7.2v nimh or nicad then it can handle a 7.4v but no more then that..and be careful and make sure that either the esc or the battery has an lvc (low voltage cutoff) 8)

It doesnt have lv cutoff but I am using an external one from common sense. I have yet to run one all the way down to cut off for fear of it not working but it is supposed to work.

your correct, each cell is 3.7v

it's not a dumb question at all.
in the general sense, you have it right as each lipo "cell" is rated at 3.7v. (thus: 1S - 3.7v, 2S - 7.4v, 3S - 11.1V, etc). however there is a "but"....

you can also wire cells in a parallel formation for longer run times.

for example, you might find a 2S2P battery... which means 4 cells have been combined to get you 7.4 volts.

i just think of it this way:
Parallel - add up the cell MaH.
Serial - add up the cell V

here's a site that may explain better than i can at 9am... http://www.glypo.com/guides/lipo/

Thank you guys. I really appreciate all the info.

J