Originally Posted by Kopsis

I remember fighting with this a couple months ago. The documented process didn't work for me. What did work were some instructions I found on a Garmin forum:

1. Plug in PowerCap with battery IN.
2. Click "check for firmware update"
3. When it says that firmware update is available, click OK. It will then notify you to take the battery OUT.
4. Disconnect PowerCap, take out battery, wait 10 seconds, plug in PowerCap (battery is still OUT at this point)
5. Click OK on the window that instructed you to take the battery out

Firmware will install

1. When it says that it was successful, unplug PowerCap
2. Wait 10 seconds, plug battery back in
3. Plug in PowerCap (with battery IN) and click configure device (button that looks like two blue arrows)

It will then tell you what version of firmware you have.