Before making a battery purchase, there are a few things you need to consider. Firstly, what are you powering? The type of hobby vehicle you are powering will determine whether you use a soft battery pack or a hardcase battery pack. For example, if you’re flying an RC Plane or Multirotor Drone, you would normally use a soft Lipo pack. However, if you’re using an RC Car a Hardcase battery pack will prevent the battery from being pierced if you crash.
Secondly, it's important to know what battery capacity (mAh) you need, the cells count (S) and the optimal discharge rate (C rating). This will also be determined by the vehicle you are using the battery for.
Lithium Polymer batteries are used in many RC hobby industries. Over the last few years, Lipo batteries have become the most popular battery choice for anyone looking for a longer run time and higher power.
Lipo batteries weigh less and can be made into almost any size or shape. Lipo batteries have higher capacities, hold more power and have a higher discharge rate, meaning they pack more punch. For safe use and storage of Lipo batteries, you need to follow the rules and treat the batteries with the respect they deserve.
LiHV stands for “High Voltage Lithium Polymer”. These batteries have been around for years and can be safely charged to 4.35V, higher than the typical voltage of Lipos.
The advantages of LiHV batteries are the higher power and longer running times. LiHV batteries can be charged to 4.35V per cell, higher than normal LiPo batteries which sit at 4.20V. For example, a 4S LiHV pack charged at 4.35V would give you 17.4V. Whereas a Lipo battery on the same charge would only get 16.8V. LiHV batteries also have a lower internal resistance and are less prone to "puffing".
NiMH batteries are rechargeable and are fantastic for commonly-used or high-drain devices. Many battery applications are compatible with NiMH rechargeable batteries, however they are best-suited for vehicles that require large amounts of energy and are frequently used.