Bat Pack 2
Here’s a great Garmin quick-release mount with MintyBoost charger mod, John writes –

The aim of this tutorial is to explain how I modified my Garmin quick-release bike mount (for the Forerunner x05) so that it can be used as a charging cradle. This allows the GPS unit to be used on long cycles/triathlons such as double centuries, ironman where the inbuilt battery is insufficient.

Garmin quick-release mount with MintyBoost charger – [via] Link.