Li Po - RC-Monster Forums

psycho · **Li Po -** 01.12.2006, 07:38 PM

Hi!
I want to use a lipo battery for a brushless BX PRO(380c).Will like to know how much amperage the battery should be in order to run at the track with my pals and able to mantain with them?
Thanks:devil

squeeforever · 01.12.2006, 09:42 PM

i would say somewere around 45 amps continuous would be plenty.

psycho · 01.12.2006, 10:04 PM

Thanks, but I expresed myself wrong. I wanted to ask of which capacity should the LiPo be?
Example 1500 mAh, 2500 mAh, etc.
Thanks:devil

SpEEdyBL · 01.12.2006, 10:38 PM

I use a kokam 3200 mah 20c (64 amp) pack. The main thing is that you make sure the max continuous amp rate is above 45 amps, assuming your running 3s lipo and 9 turn 380 motor. You need at least a 60 amp 2s pack for a 6 turn 380. How much runtime are you looking for?

psycho · 01.12.2006, 11:00 PM

I will like to be able to run with the best 3800 NIMH batteries(8min I guess?).
:devil

lipomax · 01.12.2006, 11:02 PM

A lipo pack of around 3800 mah will have the same capacity as a NiMH at 3800. Having said that, a 2s pack at 3800 will probably last SLIGHTLY longer due to the lower weight.

Get a 6000 or 8000 mah pack. Getting a higher capacity pack will allow the average voltage during that run to be higher and still weigh less. Plus, if you get 8000 mah, you can run 2x longer.

psycho · 01.12.2006, 11:08 PM

Thanks!!!
Where I can get LiPos of that capacity?How much for those?
:devil

psycho · 01.12.2006, 11:16 PM

Can I run 2 Lipos(same # of cells,voltage and capacity) in parallel and get double running time than with one?( I am newbie!!!)
:devil

MetalMan · 01.12.2006, 11:26 PM

Yes, you can. But, if you can get the battery made that way (instead of two separate packs), that would be better.

How much money are you willing to spend? I can estimate that a pack like this will be $80-180 depending upon what you want or can pay for.

SpEEdyBL · 01.13.2006, 08:27 PM

You also need to check the dimensions of the pack before you buy. The pack I have happens to be the exact same size as a generic 6 cell pack. I'm guessing I get 10-15 minutes of runtime, but to tell you the truth, I havn't had much time to run my car. Number one, it's been rainy here in Seattle for 25 days straight, (the record is 33) and we're set to break it. Number two, I only had the chance to do one almost full run and it was terminated after a crash. Other times I was limited to just a few passes.