Smart Charger - The IQ Smart Charger offers automatic charging control for DLS battery chargers, providing longer and safer use of your system's battery. The IQ controller allows the battery charge r to operate as an automatic 3-stage "smart charger". This gives the user the benefit of bulk, absorption, and float stage charging, decreases charge times, insures proper and safe battery charging , and minimizes over-charging. The IQ monitors the battery at all times. If the DLS voltage remains in the long term float stage for more than seven days, the IQ Smart Charger will automatically deliver a boost charge for a predetermined time, then return to the normal float stage. DLS units are also available with the IQ Smart Charger internally installed within the unit.