This 1F Super Capacitor is rated for 2.7V and is a through-hole component with a 2.5mm pin pitch. It is an Electric Double Layer Capacitor in a Radial package, measuring 9mm in length, with a diameter of 6.3mm.
Supercapacitors are perfect for applications where the capacity of a standard electrolytic capacitor is too small and a rechargeable battery is bigger than needed. Rechargeable torches are one such possible application.
This is the same supercapacitor used in the Kitronik Solar Torch Kit.