I had a Braille battery and had a bad experience with them. This was in my Sentra, which actually sits most of the year. I ordered model B14115, but what was shipped was their carbon fiber version model B14115c. I thought it would be OK, but while sitting up over the winter, the carbon fiber "case" separated and come spring the battery would no longer hold a charge. It was a huge hassle getting them to honor the warranty and send me a replacement, but they finally did. The new battery lasted thru last summer and sure enough this spring is dead and will no longer hold a charge. I even bought one of their trickle chargers like they told me I needed. As of this writing, they do not want to warranty me a second battery so I am shopping elsewhere.