Had one in my panel for a few years now. Also available from Allied
Electronics at www.alliedelec.com. Just search for EMV 1200.

I have it a little placard to sort of indicate remaining capacity. 100% =
12.7V, 75% = 12.4V, 50% = 12.2V, 25% = 12.0V, 11.9V = 11.9V.

Jim Vincent
N483SZ
illspam