Dec 10, 2011, 05:24 PM Registered User United States, OH, Avon Joined Apr 2011 117 Posts Discussion Battery explanation Can some please try to explain the batteries to me... Sorry im still new with the electric stuff... Like what is it the more maH the more powerful?and then number after that I have no clue ...lol example 1000maH 3S 25~50C please break this down for me ... Thnx guys
 Dec 10, 2011, 07:44 PM RC Helicopter Pilot United States, CA, Westminster Joined Mar 2010 1,696 Posts The 3S means 3 cells wired in series. Series raises the voltage. 1000mAh = 1.0AMP = capacity 25C means this this battery can continuously deliver 25 times it's capacity Which is 25 x 1 = 25AMPS Not for very long but it can. The 50C is a burst amount that can only be supplied for a short time burst.(seconds)
 Dec 11, 2011, 02:37 AM Registered User Letchworth, Great Britain (UK) Joined Jul 2004 12,815 Posts Just to add to TheWoodCrafter's explanation, each LiPo cell is nominally 3.7v, so quite often you'll see a "3S" battery described as "11.1v". Also, LiPo batteries can go up to 4.2v per cell when fully charged, so sometimes you'll see a 3S LiPo referred to as 12.6v when calculating power.
 Dec 11, 2011, 03:45 AM Registered User Staffs, UK Joined Nov 2003 11,475 Posts Just to get the units right 1000mAh = 1Amp.hour (Ah) capacity i.e. it will deliver 1A for an hour or 10A for 6 minutes (1/10 hour) etc. In simple terms higher voltage, e.g. higher "S", means more power at the motor. Higher capacity (mAh) means longer flights. Higher C-rating means it is possible to drag more power out but at the expense of less flight time. E.g. a 20C battery used to its full current capabilities runs the motor for 60/20 = 3 minutes, a 30C battery at full current runs for only 60/30 = 2 minutes. Steve
Dec 11, 2011, 07:25 AM
Registered User
USA, GA, Marietta
Joined Aug 2005
6,932 Posts
Quote:
 Originally Posted by TheWoodCrafter The 3S means 3 cells wired in series. Series raises the voltage. 1000mAh = 1.0AMP = capacity 25C means this this battery can continuously deliver 25 times it's capacity Which is 25 x 1 = 25AMPS Not for very long but it can. The 50C is a burst amount that can only be supplied for a short time burst.(seconds)
Minor correction: 1000mah = 1.0Ah = capacity

mah = milliamp hour = capacity in milliamps
Ah = Amp hour = capacity in Amps
ma = milliamp = instantaneous current flow in milliamps
Amp = instantaneous current in Amps

mah, or Ah specifies the amount of current the battery can supply over one hour. So a 1000mah battery can supply 1000ma for one hour.

However the current provided by a battery is dependent on the load it sees, which in the case of an airplane is the combination of the motor and propeller. If you increase the load, i.e. increase propeller size, the current (ma) will increase.

Glen
Dec 11, 2011, 09:09 PM
Registered User
United States, OH, Avon
Joined Apr 2011
117 Posts
Quote:
 Originally Posted by slipstick Just to get the units right 1000mAh = 1Amp.hour (Ah) capacity i.e. it will deliver 1A for an hour or 10A for 6 minutes (1/10 hour) etc. In simple terms higher voltage, e.g. higher "S", means more power at the motor. Higher capacity (mAh) means longer flights. Higher C-rating means it is possible to drag more power out but at the expense of less flight time. E.g. a 20C battery used to its full current capabilities runs the motor for 60/20 = 3 minutes, a 30C battery at full current runs for only 60/30 = 2 minutes. Steve
Thnx this was exactly what i was looking for, for now..All the other helps as well but i need to do a lil more research before i can fully grasp it all the way..