those batteries agm are used on power chairs too. they do not vent
--- On Sun, 8/8/10, Tim and Janet <kb2...@gmail.com> wrote: From: Tim and Janet <kb2...@gmail.com> Subject: [Repeater-Builder] Re: AGM Batteries To: Repeater-Builder@yahoogroups.com Date: Sunday, August 8, 2010, 1:37 PM Valve regulated batteries can and do vent at times. The best way to prevent this is to ensure you have a good charger. We use "smart" chargers where I work and still occasionally a battery will hiccup. I personally would install the battery outside of the main cabinet. YMMV Tim Campbell (The other Tim)