Minuteman Max Ride A-MR20ECO, Service Manual

Page: 15 / 29

•The greater the variation between cells in any one battery, the greater loss of running time.
A battery with variations of .040 or greater should be replaced.
•The variation of .020 is considered normal.
•Specific Gravity Readings are as follows:
1.280 and above 100% charged cell
1.235 to 1.240 = 75% charged cell
1.190 to 1.195 = 50% charged cell
1.150 to 1.175 = 25% charged cell
1.140 or less = 0% charged cell
•Load test the batteries with a battery load tester.
•The voltage difference should be less that 1 volt, when testing under load.
Any battery that has 1 or more volt(s) less than the other should be replaced
.
7. Battery Trouble Shooting
(Excessive Gassing or Water Consumption in Batteries)
Page 15
1. If the charger appears to be charging and excessive gassing or water
consumption had been or is occurring in the batteries.
2. Check the following:
3. A. Have the batteries been maintained on a consistent basis? Failure to maintain batteries will
shorten their life and reduce their performance.
B. Test the batteries with a hydrometer. The batteries should be fully charged and cooled for 2
hours after charging, before testing. Top the batteries off with distilled water prior to charging, if
needed. Do not over fill.
C. Compare the cell readings of all the cells in each battery.