I was told about this Black and Decker (VEC1089ABD -
http://www.amazon.com/Black-Decker-V.../dp/B000UZ62FM) recharger on Amazon. It has a feature for reconditioning the battery. Basically it sends low pulse waves for a 24 hour period to break up the crystalization of the fluid, heres from the manual:
Recondition Mode
Whenever a lead-acid battery begins to discharge, lead sulfate, an insulator, begins
to build up on the battery’s internal plates. This reduces the ability of the battery to
hold a full charge. When that battery has an immediate charge, most of the lead
sulfate is dissolved and the plates are free of this insulation. If a battery remains in a
discharged condition over a longer period of time, the lead sulfate changes to a hard
crystalline form, making a full charge difficult to achieve. Reconditioning may “save”
a sulfated battery.
BATTERY RECONDITION MODE should only be used with 10 Amp Hour (Ah) or
larger capacity lead-acid batteries. Charge the battery to be treated for 20 minutes,
before using RECONDITION Mode. Observe the Digital Display for any codes. This
initial charge will check the battery for shorted cells (F01), open cells (F03) or battery
too low to accept a charge (F02), and to ensure the battery can take a charge. If
code (F03) is displayed, change to the BATTERY RECONDITION MODE.
Remove or disconnect the vehicle’s battery when reconditioning.