Two way radios use several types of battery technologies. Some two-way radios take standard AA batteries that allow you to use rechargeable batteries, but in event of a long power outage, you can use off the shelf AA batteries when your rechargeable batteries die. Other radios use a custom size battery. For these you can purchase spare batteries that you can have charged and ready to go in the event your primary battery charge runs out. Two-way radios come with a charger unit to keep the primary batteries charged, and in the case of custom batteries, they usually include a slot for the backup battery too.
There are three types of batteries that are typically used for rechargeable two-way radios: nickel cadmium (NiCAD), nickel metal hydride (NiMH), and lithium ion (LiION). You cant typically choose the type of battery you use for most two-way radios. The manufacturer does that for you. Following are some of the advantages and disadvantages of each type.
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