Spraying Equipment for Vector and Pest Control may have breaks of non-operating weeks.. During periods of non-use over several weeks, the battery gradually loses its charge. Always to have the battery fully charged and assure maximum life, it is important to monitor the state of charge, in order to be always ready to use the machine for any unexpected emergency with no surprises battery. To grant this important security, all Spraying Equipment for Vector and Pest Control are now equipped with a Digital Voltmeter, big red diodes, readable up to 10 m or more. And Always On. Thus, even a machine parked at rest, the charge value is always visible. So it will be the same Voltmeter that will attract your attention, even from a considerable distance, indicating the value of the charge, and the possible need for recharging.