Consolidate battery metrics

main.go

@@ -16,10 +16,10 @@ func main() {
 	ctx, cncl := signal.NotifyContext(context.Background(), os.Kill, unix.SIGTERM)
 	defer cncl()
 
+	// Read config and environment, set up logging, load up
+	// an appCtx, and prepare ambient weather local exporter
 	ctx = app.MustSetupConfigAndLogging(ctx)
-
-	aw := ambient.New(ctx)
-	aw.MustInit()
+	aw := ambient.New(ctx).Init()
 
 	awApp := app.App{
 		AppContext: ctx,