I read in the Vagabond Mini Lithium manual that the VML can be used with an external sealed lead acid SLA battery such as a car battery. I am quite interested in this as a backup power source. I do not anticipate running out of juice on a shoot, and I do not shoot heavy enough to require two batteries, but it would make me a little more comfortable knowing that I have the option to connect the VML to my car battery to continue shooting. I also always have a motorcycle battery and jetski battery on a charger ready to use, I could just toss in my bag as exta 'just in case' juice for when I am in the field.
Has anyone made this connection as described in the VML owners manual? Does anyone have any experience using this as a power source for the VML?