When should I charge my rechargeable batteries?

Just prior to use, charge your rechargeable batteries (Part #: RF16 or RF46) for at least three hours using the 10-Station Battery Charger (Part #: RF25). A fully charged battery when plugged into a module should read 6.7V or higher on the GPM software screen. Typically, a fully charged rechargeable battery should be able to power a module for at least ten days under normal conditions (20°- 40°C, GPM settings of 60-second Live Interval, and one Valve Open sequence per hour). Individual performance may vary depending on testing conditions. Although modules will function properly, the rechargeable batteries may have to be recharged at more frequent intervals when operating at lower temperatures. Rechargeable batteries lose charge when not being used.

When running the system, remember to check the battery voltage several times daily and change the battery pack when the voltage decreases to 6.3V or lower (in the GPM software, a module's voltage cell will be shaded YELLOW under these conditions.) Changing the battery pack during the run will not affect the results. Avoid allowing the battery voltage to drop to less than 6.00 volts. The module's voltage cell will be shaded red under these conditions. A battery with a voltage of less than 6.00 volts may lose communication at any time.