nikki-k
Experienced
I smell "Wiki'd"
Here are the facts:
1. There are two options regarding non-volatile storage: battery-backed RAM or FLASH. EEPROM and FRAM are other options but prohibitively expensive.
2. FLASH is slower and has limited write-endurance. You'll notice that whenever you save presets on a FLASH device there is typically a progress bar as the preset is being saved.
3. SRAM is extremely fast but requires a battery to maintain the memory when AC power is removed.
4. A capacitor is not a substitute for a battery. A so-called "super-capacitor" can be used to retain memory for short periods but is not suitable as a battery substitute.
In the Axe-Fx II you get the best of both: SRAM for speed and endurance with FLASH backup.
Replacing the battery does not void the warranty. This is totally unfounded.