The use of supercapacitors a a replacement for a backup battery for power ride-through applications is described.
LTC3225 supercapacitor charger
Supercapacitors (or ultracapacitors) are finding their way into an increasing number of applications for short-term energy storage and applications that require intermittent high energy pulses. One such application is a power ride-through circuit, in which a backup energy source cuts in and powers the load if the main power supply fails for a short time. This type of application has typically been dominated by batteries, but ...