Garmin 800 battery replacement

[V17L]

Hi,
Just wondering if anyone has replaced their own battery in the 800.

On youtube there is a video of how to change the 800 battery https://www.youtube.com/watch?v=nVkkYNyednY

Interestingly the video shows the garmin original battery at 1100mAh, and the replacement battery is 1000mAh.

Any other nline battery replacement stores that people know about? If you have changed the battery over, how was it afterwards
cheers
stevet