FLIGHT FIXIT
MultiRotor Specialists
Multicopter Battery Information
The batteries that Multicopters use are called Lithium Polymer batteries, they are abreviated Li-Po Batteries. The reason that we use this type of batteries is because they have the ability to store lots of power, and at the same time are very lite.
When choosing a battery for your copter there are a few things that you have to remimber, And also a few things that you need to know about Li-Po batteries. Li-Po's are measured in 2 ways, cell count, and MiliAmp Hour, abreviated MAH. The higher the MAH the longer that the battery will last for, and for the cell count, teh higher the cell count the more powerful the copter will be. With quadcopters we usually stu=ick around 3-4 cells per battery. Each cell is 3.7 Volts, and you add the voltage together for each additional cell you have. So, a 3 cell battery would be 11.1 volts, and a 4 cell battery would be 14.8 Volts.
When actually picking out a battery you have to make sure that it can support all 4 motors, and also make sure that it doesn't have too much power for your motors to handle. Make sure that the motors you choose support the voltage of battery that you choose.
So, for example, if you picked a motor that has 3 cell and 4 cell support, and has a total watt draw of 200 watts, 3 cell and 300 watts, 4cell, then you need to pick a battery that can handle at least 800 watts 3 cell, or 1200 watts 4 cell.
The way that you find the amount of watts of a Li-Po battery is you take the mah of the battery and you multiply it by the C rating. The C rating is the MAH multiplyed by the c rating. It is the amount of power that the battery can output at one time. So, take the MAH multiply it by the C rating, then multiply that number with the voltage of the battery. Finally there is your wattage.
So, the goal here was to make sure that your battery can handle the watt draw of your motors. If the batteries watt discharge is greater than the watt pull of your motors you are good to go!