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Your vehicle's battery is located in the trunk next to the compact spare tire. To access the battery, use the trunk's floor carpet latch to lift the cover up.
To charge it would require a battery charger, if you are jump starting there are remote connections available under the hood.
You will not need to access your battery for jump starting. Your vehicle has a remote positive (+) and a remote negative (-) jump starting terminal.
The remote positive (+) terminal is located on the engine compartment fuse block, under a red cap.
The remote negative (-) ground terminal is a bolt located under the metal frame that supports the radiator. It is at the front of the engine compartment, on the driver's side of the vehicle, and is marked with a label that says GND (-).