Coin Battery

[Calcoaster]

I plan on doing a bit more testing with the battery out and will do a better job of documenting the results. Anyway just like my smoke alarms I will change the coin battery on some annual schedule just to avoid any issues.

I’m curious about the TCU battery too. Any updates or information about the purpose of the battery? It seems logical that it could be to store changes to the default rider settings, but logic doesn’t always dictate how things work.

 

[mschwett]

I’m curious about the TCU battery too. Any updates or information about the purpose of the battery? It seems logical that it could be to store changes to the default rider settings, but logic doesn’t always dictate how things work.

probably stores settings in case the main battery is fully depleted or disconnected; for example, specialized supports powering a creo or vado sl only from the range extender (if the main battery was removed for a flight, for example) in which case unplugging the RE would result in all settings being lost, which would be most frustrating!

that would also result in a VERY long lifespan, i do not believe for a second that the TCU itself is powered by this battery. if it was, we’d have lots of reports of fully charged bikes unable to operate because the TCU battery was dead.

 

[Calcoaster]

probably stores settings in case the main battery is fully depleted or disconnected; for example, specialized supports powering a creo or vado sl only from the range extender (if the main battery was removed for a flight, for example) in which case unplugging the RE would result in all settings being lost, which would be most frustrating!

that would also result in a VERY long lifespan, i do not believe for a second that the TCU itself is powered by this battery. if it was, we’d have lots of reports of fully charged bikes unable to operate because the TCU battery was dead.

You might be right. It could function like the CMOS battery backup on a PC motherboard and store any user settings other than the default, like a custom assist level. When the PC coin cells died, windows would ask for the time and date every time you booted up. The other BIOS settings it backed up usually didn’t cause any problems. At any rate, I’m sure you’re right that the TCU operation itself isn’t dependent on the coin cell battery.