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        Discussion Using a lipo to power a RX

#1 SohoR1 Sep 18, 2012 07:14 PM

Using a lipo to power a RX
I'd like to power my RX with a lipo instead of a nimh for my nitro planes.

I've got a few planes varying in size from a GP Cherokee, a Big Stik 60, and a GP P-40 Warhawk. I'm just not sure what size battery I should be using, and the BEC or ESC/BEC combo.

Will this combination work?



Thanks for your help!

#2 rcshirt Sep 19, 2012 08:46 AM

a lipo and a bec will do the trick. just like a power box set up for 3d planes.

where do you fly?

#3 jymz Sep 19, 2012 09:01 AM


Just use this and forget the BEC

#4 SohoR1 Sep 19, 2012 10:20 AM

I fly at SparksRC in st petersburg, fl.

Does that battery have the correct connector to plug into my spektrum receivers?

#5 rcshirt Sep 19, 2012 02:46 PM

it says it has a jr adaptor. so it will fit a spektrum. just make sure the servos can take that voltage.

#6 SohoR1 Sep 19, 2012 02:56 PM

how do I make sure that the servos can take that voltage? Wouldn't a BEC do that for me?

#7 rcshirt Sep 19, 2012 03:28 PM

some of the older servos didn't like over 6 volts. Usually a bec can be changed between 5v and 6 v. I run my converstions at 5v to be safe. unless you really need high speed 6v isn't going to be noticed. and on a p40 you really don't need high speed servos.

you would have to look up their specs on each sevo.

#8 1320fastback Sep 19, 2012 03:31 PM

A 2S of around 750-1000Mah will power what you have for Multiple flights without recharging.

I use Lipos exclusively in my glow planes and always use a CC BEC. Have never had one hiccup.

#9 600Bob Sep 19, 2012 04:09 PM

This one has the proper connector.

I use the 2100mah version of this one in many of my planes. Good with any servo rated for 6v. Most good Lipo chargers have a setting for these batteries. They also are not as much as a fire hazard as Lipos. And no regulator to fail.


#10 Lifer Sep 20, 2012 05:28 AM

Plus 1 on the LIFE packs!

#11 SohoR1 Sep 20, 2012 07:10 AM

What size Lifepo should I be using for my GP Cherokee? Looks like my option are 750mah to 1500mah

#12 rcshirt Sep 20, 2012 10:36 AM

i like 100mah in most of mine. Although a standard 4cell nicad was only 600mah for a 4 servo plane.

#13 rcshirt Sep 20, 2012 10:37 AM

sorry 1000mah

#14 jymz Sep 20, 2012 10:47 AM

I know the picture shows different it will come the same as the 700mah battery. (I have both) No adapter is required.



#15 600Bob Sep 20, 2012 10:53 AM


Originally Posted by SohoR1 (Post 22783382)
What size Lifepo should I be using for my GP Cherokee? Looks like my option are 750mah to 1500mah

The ones linked in my post, #9 are more than 1500mah, as high as 3200mah. I like as much as I can fit in the plane, generally a 2100mah for a plane the size of the Cherokee.

Maybe not the best prices but a list of whats available from one brand.


Another option with standard JR plug.


Do not go by pack voltage to determine when to stop flying, go by MAH used like with a Lipo.

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