Batteries are one of the most essential part of your tech companion, the drone. Having a longer flight experience for your drone means longer videos and long lasting streams of aerial photos. So, choosing the right battery for your drone is of paramount importance as not every battery available in the store, fits in to every drone.
All most all the drones that are available in the market today, does come with a battery along with the device. But it is always good to have an extra one in hand; when the primary battery is being charged, a second one can be used on the drone.
Before we look at the batteries that are available for our drones, we will first have a small primer on them.

Types of Batteries:

Nickel Cadmium ( NiCad ) batteries were being used earlier, and now the Lithium based have taken over.

Lithium-Ion Battery: These were the earliest incarnations of Lithium based batteries, where intercalated lithium compound is used as one of the electrode. These are the most popular ones in rechargeable family and they have high energy density, meaning these batteries run longer, in one charge, than the other conventional ones.

Li-Ion batteries are also low self-discharging – this means that even if you put it away on the shelf for more than a month without using it, it would not loose much energy because of low self discharge and hence longer battery life per charge.

When there is a physical damage to the battery, it poses safety risks since the contained electrolyte is inflammable.

Lithium Polymer Battery: Lithium Polymer, or LiPo in short, could be called as a second generation of Lithium based batteries. These uses a solid polymer electrolyte like poly ethylene oxide or one of the related variants. LiPo are light in weight which makes them a better choice, especially for air borne vehicles, since an amount of payload is one of the crucial parameters for drones.
Just like Li-Ion, LiPo also is very low on self-discharge and also has high energy density. LiPo batteries are safer than their ion counterparts as LiPo comes with protection circuit called PCM and this gives protection against overcharging.
Lithium Metal Battery: There has been a lot of research in the area of energy storage mechanisms and systems, and batteries are no expection to this. A recent MIT news suggested that a new Lithium metal batteries could double the storage capacity, for the same size as that of LiPo or ion based ones.
On the same note, a tech startup is on its way to commercialize the Lithium metal batteries and these might hit the stores in few months. So, time is not far when LiPo batteries might fade away into the past too. But until then, we need to stick to these as they are the best in the market as of today.

DJI-P3-Battery Intelligent Battery for Phantom 3 Drones

DJI recommends to use only DJI manufactured batteries for all its drones.
This is a LiPo battery that provides 15.2V of power with a rating of 4480 mAh and can be used on any of the Phantom 3 series drones, namely Phantom 3 Standard,  Professional and Advanced. It has LED display that shows the status and the remaining power on the battery. This provides a running time of around 20 minutes.
DJI also suggests to discharge it completely, using smart charge/discharge functionality, once every 20 cycles.
Please note that these aren’t compatible with other DJI series like P2 or P1, but only with P3 series.
Upow 2 PCS Upgrade Lithium-Polymer Replacement Battery for Parrot AR.Drone 2.0 (1500mAh)
These are meant to be used for parrot AR drone 2.0.
Upow battery are high density LiPo batteries that provides a flight time of more than 20 minutes and has a power rating of 1500mAh with 3.7V. This comes with a PCM too, that protects against short-circuit or over charging of the battery.

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