The Portable Power Source for G3 Series Receivers (PPS-G3) is an optional add-on suitable for a number of external G3 receiver models (G313e, G305e, G315e, G31DDC, G33DDC, G33WSM, G33EM) to provide mains-independent power for field operation. It is designed to mate directly underneath the receiver unit. Power to the DC input jack of the receiver is provided via a short length of cable.
The PPS-G3 contains four high capacity rechargeable LiPo (Lithium Polymer) cells. Their voltage is regulated using high-efficiency switch-mode converters to a stable output voltage necessary for the receivers. The PPS-G3 monitors each cell separately, ensuring full charge of each cell, thus reaching maximum possible capacity of the whole battery pack in the shortest possible time.
Depending on the type of the G3 series receiver and its settings, the PPS-G3 will typically provide power for 3 to 6 hours of continuous use. The same AC/DC adapter originally supplied with the receiver is used to recharge the PPS-G3 unit. The receiver may still be used while the unit is charging.
The PPS-G3 can also function as an uninterruptible power source (UPS): Under normal circumstances, the receiver is powered from a power adapter (via the PPS) and in case of AC power dropout, the power for receiver is immediately supplied by the PPS-G3 batteries without any noticeable interruption.