How to replace Vigil II Battery

Note: Vigil Manufacturer, AAD, no longer supplies batteries for replacement by the user or riggers. Vigil owners must now send their units into Vigil America or AAD to have the battery replaced (see here). These instructions below were made when the batteries were available separately. The Vigil II battery is designed to last a minimum of 2000 jumps. The manufacturer recommends replacement at 5 years and mandates replacement at 10 years.