• LiPo - Lithium-ion Polymer
  • NiMH - Nickel-Metal Hydrid
  • Discharge Rating


Capacity is denonted in milliampers hours (mAh) on the battery. It is the amount of charge stored in the battery. If you have a battery with a capaciy 1 mAh and a motor is drawing 1 mAh then your motor will run for 1 h. In general the \textit{approximate} duration of a battery can be computed by:

If you have a 4700 mAh battery and it is powering a moter with a 100 mA load, it will keep runing for approximatly 47 hours. reference


Battery bank

Combination of multiple batteries reference

  • joined in series: voltage increases, capacity remains the same.
  • joined in parallel: voltage remains the same, capacity increases.
  • series and parallel: both voltage and capacity increase.

A guide to understanding battery specifications

RC battery guide

Pixhawk 2.1 battery stuff

Power brick mini

  • Max continuous current sensing: 30A
  • Max burst current: 100A
  • Connectors: XT-60


  • Ampere: A - base unit. Attractive/repulsive force of Newtons between two wires 1m appart is the definition of .

  • Coulomb: C - charge transported by a constant current of 1 A in on second.

  • Electrical work is the work done on a charged particle by an electric field.

  • Watt : W - power.

  • Volt: V - pressure

  • Ohm: - electrical resistance



  • Ah - ampere hour
  • mAh - milli ampere hour