VIOFO EP100 Expansion Battery for BP100 Battery Pack, Easy to Expand Capacity for Much Longer Parking RecordingVIOFO EP100 Expand Your BP100 for Much Longer Parking Surveillance The EP100 is an expansion battery module that connects to the VIOFO BP100 battery pack to significantly extend parking mode recording time. Each EP100 adds substantial capacity connect up to two EP100 units to a single BP100 to roughly triple your total parking surveillance time. If 32 hours of parking protection isn't enough, the EP100 makes multi day coverage possible without