charging two lipos on one charger

[honda237]

I was wondering if I could charge two lipos on one charger. If I make a connector that would make the batteries in to a saddle pack for charging.

 

[CharliesTheMan]

Well you can buy a charger that will charge two LiPos at one time but I REALLY wouldn't reccomend charging two batteries rigged up to one charger that was designed for one battery. You're going to need to have a LiPo balancer hooked up to the batteries and I don't see how you could have a 2S balancer connected to 4 cells and expect it to balance correctly. I think you're going to be asking for a fire or explosion. LiPo batteries are really safe and easy to use, UNLESS they are used improperly, and that sounds like very improper usage to me.

Here's the accu-cycle charger that will charge two batteries.
http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXEYD4&P=ML

You will also need to buy two balancers with the charger above.

Here's the charger that I use and reccomend, and it charges and balances at the same time without buying an additional balancer. I can't say enough good things about this charger, and I've got 6 LiPo batteries that I use regularly.
http://www.maxamps.com/EOS0606i-AC-DC.htm

 

[honda237]

I was just wondering because I was going to put a brushless system on my new e maxx when mamba comes out with there system and i was going to use two 3 cell 3200 mah lipo since i already have one.

 

[CharliesTheMan]

Yeah that's what I did with my Revo. I had a 6000 mah 2S LiPo so I bought another one so that I could make use of a battery I already had and still have a matched pair, and I can run them seperate in my other RC's if I want. I try to set up my rigs so that the batteries interchange to help with efficency when spending hundreds of dollars on LiPo batteries.

 

[honda237]

Do you know what your runtime is?

 

[robmob]

This charger is the only one I would trust to charge 2 different Lipos at one time.

Max 10A charge rate with built in balancers to boot.

http://www.maxamps.com/EOS0610i-DUO.htm

I want one.

 

[CharliesTheMan]

I absolutely LOVE my hyperion, and it's all I will be buying from now unless something happens to change my mind

 

[honda237]

I think I am going to buy two maxamp 2s 5000 batteries and I am going to buy a new e maxx next week and buy the mamba monster system when it comes out and plus another charger. I want to make the emaxx fast but not so fast that I can't controll it. The guys at castle creations said that 4 cells is the sweet spot and it will go about 40mph with stock gearing but the other guy said to run a 14 or 13 pinion.

 

[honda237]

I looking at maxamps website when i discovered their dean series adapter the link is http://www.maxamps.com/Deans-Series-Adapter.htm
I called them to see if i could use this for lipos and they said it would work, all you could is charge as a 4cell lipo if you were charging 2 2cell lipos with the same mah. It cost $9.99 which is a lot cheaper than a new charger.

 

[CharliesTheMan]

Yeah it will handlethe 2 cell batteries, but your charger wont handle the 2 3 cell batteries that you asked about before. Also, don't forget that you need to balance them too.

 

[honda237]

I know that I was first going to go with 2 3cells but mamba said that it made the e maxx uncontrollable fast but they said 4 cells were the sweet spot and it would go little 40-45mph. Maxamps said that you only need to balance lipos once a week.

 

[CharliesTheMan]

oh ok, I think two 2 cells is the way to go as well, that's what I'm going with on the Revo.

 

[honda237]

Do you know what rough estiment of the runtime would be with 2 5000mah 2cell maxamp lipos?

 

[abadk9420]

Probly 30 plus minutes all depends on esc and motor combo, the hotter the motor the lower the run time, and vise versa...

 

[CharliesTheMan]

I'm thinking maybe 15 minutes if you get lucky. I was reading an article in the new XRC where they had 2 4000mah 2S batteries in a 1/18 nitro conversion buggy with the novak hv pro brushless system (same size as the one you'll have) and they were getting 6 minutes of run time. These are big systems that draw a lot of power, and I will be running two 8000 mah 2 S lipo batteries.

 

[honda237]

I plan on running the stock system until mamba comes out with their system.

 

[CharliesTheMan]

What kind of ESC are you going to have, because a lot of the trucks wont handle lipo with the stock setup. Didn't you get an E-Maxx?

 

[honda237]

Yes I did just ordered the e maxx today. the esc can handle it, They tell you not to use lipo because it does not have a cutoff. I have used alot of lipos and I know to stop when the performance drops and that is safe for the packs and it is only going to before a couple of weeks until mamba comes out with there system.