As a general rule disconnect the battery and use a smart charger or battery tender. Very few convertors do a proper job of charging a battery properly. Some make a lot of claims but it is mostly ad hype. The latest ad hype is four stage charging; there isn't such a critter. What some 3 stage smart chargers do is pulse the battery with a high frequency or raise the output to around 15 or 15 and 1/2 volts for De-sulfation. This is the ad hype about 4 stage. It works on a programmed time schedule such as every 28 days or once a week for 15 minutes.
It is always a good idea to check fluid levels about once a month while stored until you get a feel for what your charger/tender is really doing.
Check out this link: http://www.reuk.co.uk/Battery-Desulfation.htm
or this one http://www.batteries-faq.com/activek...p?questionid=1
for additional charging information the Trojan battery web site also has good info.
Your specific battery maker may also have a web site with charging info.
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Axis 24.1 E 450 chassis, 6 spd tranny. GVWR 14500# GVCWR 22000 # GW(scales) 12400 #
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