Batteries are items that appear in various games in the Kirby series, serving different functions in each appearance.
Kirby Air Ride
The battery power up in Kirby Air Ride temporarily causes the player's machine engine to go into overdrive. This makes the machine very speedy and uncontrollable but wears down after a while. They can only be found in City Trial mode.
The charge patch also appears to be a battery, and serves the purpose of making the machine charge faster. Additionally, charge patches with a dignifying "X" marking appear. These patches disable the ability to charge for the machine in use.
Kirby & The Amazing Mirror
|Restores one power bar to Kirby's cell phone.|
— Kirby & The Amazing Mirror manual
In Kirby & The Amazing Mirror, batteries replenish the battery life of Kirby's Cell Phone. They can be found in certain parts of every area, as well as during the Warp Star ride after reaching a goal. The Cell Phone can hold up to three battery units. Each time it is used, one "bar" depletes, recharging itself after an elongated amount of time. The Cell Phone's energy is also used up if the player cancels their call to other Kirbys. Using the Cell Phone to summon a Warp Star does not use up battery life, however, and can be used even when it has no battery life left.
The batteries disappear when picked up, but reappear when Kirby completes an area by reaching a goal or defeating a boss. Kirbys that are not being controlled by players cannot pick up batteries. Unlike food items in the game, batteries cannot be shared with Kirby's teammates during single player or multiplayer modes.
Kirby: Planet Robobot
In this installment, batteries are handled in much the same way as Keys and other utility items, and must be carried rather than simply picked up. They appear in various stages as large glowing green containers with energy insignia on them. They are needed to power certain devices found in the stages, in order to allow Kirby to progress further.
In some cases, Batteries may need to be charged up using an electric-based ability before they can be used.
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