CAP-XX Limited announced that Jack, developer of the first windshield breakage detection solution, has selected the CAP-XX HS208F supercap for its solar-powered IoT device. Jack chose the CAP-XX prismatic supercapacitors for their ability to store the solar energy harvested by the device's onboard 4-cell solar panel, for their low ESR which enables the high burst of power needed for the device's advanced Bluetooth Low Energy (BLE) data transmissions, and for their thin form factor which fits easily inside the small (L x H x W) 134mm x 22.30mm x 27.60mm IoT device. The Jack device only needs a small 1.2Ah Li-SOCl2 backup battery because the CAP-XX supercap stores enough solar energy to almost completely power the device from solar light. The Jack device communicates via BLE 5.2 with a certified Gateway device, which can be an Android or iOS phone app using the Jack SDK, Jack's own Android/iOS phone app, Jack's Gateway telematics solution or a third-party telematics solution with Jack support. Jack uses the ultra-power-dense CAP-XX HS208F supercap to deliver high currents required by the IoT application. Features of the CAP-XX HS208S supercapacitor include: 900 mF /5.5 Volt; -40 to +85ºC; 39 x 17 x 3.4 mm; Very very low ESR of 45 mO; Remarkably low leakage current 1 µA (micro-Amp).