Battery pack mod

[Mikuri]

I've search the complete forum. Got some answers but now that I think I got it all, I'd like to make sure. And maybe possibly find some new alternatives.

My MOC has 2 RC buggy motors and 1 servo motor.

I'd like it if someone could tell me if 1 battery would be enough (a custom one) to power all of this via the IR receiver V2 (two of it if necessary).

I know a 2 cells LiPo at 3.7V gives 7.4V so a bit under 9V... But it should works.

But then, can't it handle a 3 cells for 11.1V?

Also, if I understood well enough, a 5000mAh should stay alive faster than a 1500mAh.

And the battery must be able to output (discharged rate) high enough for the batteries (which should be very easy with a 20C I think).

So... Am I right or did I missed something?

[Zerobricks]

If an RC unit with 2 RC motors can run off 6 AA batteries I cant see why a custom battery box wouldnt. 11,1V is at the limit, some people did try this, But I would not recommend it. The higher the voltage, the higher the current, square higher the power (and a chance for something burning).

You got more or less all figured out

[AndyCW]

• As far as I know, the V2 receiver may not withstand 3 cells at 12.6v.
  
• You will definitely need two V2 receivers.
  
• 2 cells will be fine, but the constraint on the system will be the current limit of the V2 receiver.
  
• Yes, all other things equal, a 5000mah battery will last longer than a 1500mah one.
  
• A 1500maH battery with a 20c discharge rate can support a maximum draw of 30 amps. This is more than you'll ever need.
  
• The setup that you outline has no low voltage protections. Be careful not to over discharge the Lipo battery.
  
• You will need a special charger for the battery.
  

My recommendation is a 2 cell battery of about 2000mah and whatever C rating you can find, the higher the better.

v/r

Andy

• 
  

[MajorAlvega]

You could use the 3 cell batteries but to be safe add at least 1 power diode (like 1N5401 for max of 3A, also pay attention to heat at the diode) so the final voltage drops to ~ 10.5.

[aol000xw]

If you want to take the easy route you can always go for LiIon with protected Panasonic ncr18650b

It is a 2C 3400 mAh -6.8amps-, powerful enougth for two stalled RC motors. So probably able to handle 4RC motors in normal conditions specially when those are hooked to puny PF receivers (be it V1 or V2).

http://industrial.panasonic.com/www-data/pdf2/ACI4000/ACI4000CE76.pdf

Some charger and cell holders...

http://www.dx.com/p/soshine-1-5-lcd-universal-charger-for-li-ion-lifepo4-26650-18650-9v-ni-mh-c-aa-aaa-9v-black-289179

http://www.dx.com/p/7-4v-2-x-18650-battery-holder-case-box-with-leads-100997#.VGTlSfnF88o

http://www.dx.com/p/11-1v-3-x-18650-battery-holder-case-box-with-leads-100996#.VGTom_nF88o

[Mikuri]

Wow, got so many answers :)!

Thanks everyone ^^!

Does anyone has a setting he actually uses in picture? Even if it's not the same, it would be cool to see what custom battery packs we all use :D

[MajorAlvega]

I'm currently using 8xAA NiMH for tests since I dont' have a LiPo charger (but last post may force me to change that ;) )

The red plugs allow me to add a multimeter (serial) so I can measure current consumption.

Edited November 14, 2014 by MajorAlvega