Why Isn't my unit turning on? The unit comes with a safety feature, where the unit will not turn on if the battery is not inserted correctly. Related articles Is the battery fully charged? How do I limb a tree? Is there a faster charger to charge my battery? Why won't my 24V-AGR100 unit turn on, even though the battery is charged? How do I know if the battery for my 24V-DRNCLN-SK1 unit is fully charged?