Good Read9 May 2018 19:20
"The two main requirements for smart meter back-up are (1) that the source is capable of turning on instantaneously; and (2) that it works at low temperatures, because meters are typically installed outdoors. Supercapacitors excel in both requirements as they react immediately, allowing the meter to transmit an alert as well as status and usage information to the network."
In conjunction with the recent podcast relating to Prizmacap and smart meters...explains the increased temp range of the Prizmacap.
"Until recently, the supercapacitor market has grown largely at the expense of conventional capacitors. Currently, the technology seems ready to invade the lithium-ion battery market share for smart phones and other devices that perform multiple functions more or less simultaneously, and therefore, have similar spiky power-to-available-energy profiles."
https://www.mouser.co.uk/applications/new-supercapacitor-applications/
"Until recently, supercapacitors were relegated to fairly mundane applications such as memory protection and internal battery backup, but in the last few years the application space has broadened significantly into hybrid vehicles, smartphones, and energy harvesting. New technologies on the horizon promise to bring supercapacitors into full competition with rechargeable batteries."
No idea how old this article is.....but all credit to AK ......excellent foresight, we just need a little more patience.