Rev. A-051007
P/N VDC36271-MNL
BatteryMINDer
®
Model 36271
Page 10
Testing with a Hot/Cold Calibrated
Hydrometer Tester
Read the tester instructions carefully for most
accurate readings.
1. When using the tester the first time or after a
long period of non-use, fill the tester with the bat-
tery fluid and let it sit for 1/2 hour or longer. This
will soak the balls in order to give you more accu-
rate readings. Failure to do so will give you false
readings indicating a battery that may not be in as
good a condition as you may have thought.
2. After inserting the tester in a cell, gently tap the
tester several times against the inside wall of each
cell to dislodge air bubbles that will cause more
balls to float than should. Failure to do so will yield
false readings that indicate a battery that is not
fully desulfated or does not qualify for desulfation.
3. If no balls float in any cell, the cell is shorted.
This means your battery is beyond the point of
being properly recharged or reconditioned-desul-
fated. Dispose of the battery.
If each cell floats three (3) or more balls (or 1250
on gauge-type), your battery can be desulfated-
reconditioned.
4. Always rinse the tester with fresh water after
every use. Failure to do so will cause false read-
ings.
Testing Sealed, AGM or Gelled-type
Lead Acid Batteries
These batteries have no filler caps or manifold-
type covers. Because you cannot gain access to
the interior of your battery you cannot test it with a
hydrometer.
Testing Using a Digital Voltmeter:
1. Recharge batteries with the BatteryMINDer to
ensure they are as completely charged as possi-
ble, before you determine its condition. Allow bat-
teries to “rest” (see pg. 9) overnight for a minimum
of 12 hours before testing with a digital voltmeter
only.
