Replacing a soldered-to-PCB battery?

[bobviolence]

Attached is a picture of a PCB that controls a water softener with the red arrow pointing to what I believe to be the onboard rechargeable battery which helps maintain the system settings in the event of a power loss.

Due to age (10+ years), it will no longer do this, and I'm assuming that if I replace the battery, this will be resolved.

My questions are:

1) Have I correctly identified the battery?
2) If I replace it, will this issue be corrected?
3) Where do I find a replacement battery? (digikey.com?)

The battery has 2 solder points coming off of it.

The only markings on the battery are (in no particular order):

833
1.0F
5.5V
The symbol "M" which is in a boxed circle, followed by GC.
Japan
"-" symbol, presumably for the negative terminal.

My soldering skills are pretty decent, so that shouldn't be an issue.

Thanks in advance.

 

[keith1200rs]

It is a 1Farad capacitor. While it could be faulty, it is a lot less likely to be faulty than if it was a real battery.

I wouldn't bother trying to replace it unless you can confirm it is faulty. Try measuring the voltage across it.

Keith

 

[rajudp]

yes it is a capacitor used to maintain the RTC

 

[FvM]

It's not unusual, that supercaps loose their capacity after years. I already had to replace some.