21+ Pokemon Go Plus Battery Change Pics. Can't find what you're looking. According to this article (specifically, point 13;

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The battery is found on the back of the device. At some point the pokemon go plus accessory will need a new battery or need to be reset for a new phone. Each pokémon go plus device comes with a battery but it could have become dislodged.

Here is how to do both.

You can catch pokémon and spin pokéstops just by pressing the button. Only using pokémon go plus, we were on 65% coming into the office, so it's not quite as draining but still enough for us to continue to keep a battery pack handy. I haven't opened my pokémon go plus yet. Unpairing the pokémon go plus from your deviceto use your pokémon go plus with another when the pokémon go plus vibrates, it has been successfully unpaired from your device.