If your device runs on batteries, you will eventually have to replace them when they run out of juice. There are several types of batteries to choose from. However, you should first know what your device uses. The size is the most critical consideration, which can be AA or AAA, among others.
You may also want to decide whether you should go for single-use batteries or rechargeable ones. For most people, rechargeable batteries are the better option because you can use them again and again. However, single-use batteries, such as the Ultra Alkaline AA Battery from GP Batteries, can give you more benefits, such as longer shelf life. It means that you can buy them without using them for a while. You can store them for a year or so, and their performance will not degrade.
Although rechargeable batteries can be reused, single-use products last longer even if you insert them in power-hungry devices.
Aside from the size and the number of uses, you should also know the exact type of battery you need. Some choices include alkaline, lithium-ion, and NiMH.