Posts on the Alpisto engineering blog filed under #supercapacitor.
A solar-powered BLE variometer that weighs under 8 g and never needs a battery change. Supercapacitor energy buffer, USB-C emergency charge in 60 seconds, 500,000 cycles, operating range -15 °C to +70 °C — designed as a primary vario for hike-and-fly paragliding.