Press the battery-release button (located on the battery) and pull the battery from its tool.
Slide the battery into the battery charger until it stops or you hear a click (locking mechanism).
Verify that the battery charger is plugged in and the battery is charging; an indicator light on the charger will be lit when powered and charging.
Remove the battery from the charger when the charge light (on the charger) turns green, indicating a full charge. For chargers with a locking mechanism, the battery can be removed similarly to step 1.