RC India

General Topics => Beginners Zone => Topic started by: Surajit Paul on February 18, 2016, 01:03:58 PM

Title: phone battery in RC
Post by: Surajit Paul on February 18, 2016, 01:03:58 PM
Hi Team,

Can i make a battery pack with 4 cell phone battery (2400 mhz) and run 2 of 12v dc motor..  :headscratch:
what will be the C rating for that pack?
Title: Re: phone battery in RC
Post by: Tanmay.mathur on February 18, 2016, 01:17:24 PM
somewhat 2c. depends upon battery type
Title: Re: phone battery in RC
Post by: Partha Dubey on February 18, 2016, 03:02:26 PM
hello.
did you mean mAh???...because mHz has nothing to do with batteries  ;D
and please remember that the voltage will be around 16.8.....might burn out the motors on putting load....
Title: Re: phone battery in RC
Post by: Balakrishna Reddy on February 18, 2016, 03:41:17 PM
Hey buddy don't say as 2 motors, say in terms of current draw because depending on load on the motor current draw changes and thereby many things can change with battery also.
Title: Re: phone battery in RC
Post by: Sukhpreet on February 18, 2016, 06:31:24 PM
yup i suppose.........
if you will connect them in series...then the voltage increases, if you connect them in parallel then capacity......:)

Talking about 18650

https://www.youtube.com/watch?v=Jpb34ur8e0c

See for DIY  18650 pack on youtube :)
Title: Re: phone battery in RC
Post by: Surajit Paul on February 19, 2016, 01:04:05 PM
Hi Sukhpreet,

can you please suggest me thean if i connect 4 pice of 18650 laptop battery then how much discharge rate i will get?

I need around 12C discharge rate...

I need to run 4pice of 12v jhonson geared motor.

you can share your phone number also I will call you...
Title: Re: phone battery in RC
Post by: Tanmay.mathur on February 19, 2016, 01:20:13 PM
oh indeed then I suspect  u might need 18 batteries.  you'll need a 3s6p when using ncr18650be. 
Title: Re: phone battery in RC
Post by: Surajit Paul on February 19, 2016, 03:46:34 PM
you mean :-

4 parallel sets of 2 series battery, like below right.

====

can this pack will be suitable with 4 pice of 12v johnson motor,

it will provide 14.8v and 4400 mah but what will be the C rating.. ?
Title: Re: phone battery in RC
Post by: Sukhpreet on February 19, 2016, 09:50:06 PM
Then I don't recommend these batteries........
I saw 2 post of yours....one this and another one for was related to laptop batteries...... I think I replied at a wrong post .....:p

These are good for simple RC planes......basically light weight trainers which won't need much power..,...