BatteryMINDer E12248-AA-Series - Manual (Page 18)

BatteryMINDer ®
Aviation-Adjusted Models E 12248-AA-S2, S3 & S5
Rev. C-071213-1 Page 18 P/N VDC E 12248-AA-Sx-MNL
MAINTAINING MULTIPLE BATTERIES
BatteryMINDer Aviation Maintenance Charger Desulfators can be used to
maintain up to six 12-Volt batteries at a time, providing each battery is fully
operational (no dead-dying cells), free of sulfate and meeting the minimum
open circuit charge “rested” voltage of 12.7 Volts, after being fully desulfated.
Never connect two or more batteries together unless they are fully
charged. ALL batteries MUST be properly tested to ensure they are
in good condition (no dead-dying cells or excessive sulfation) before
maintaining them in multiples. Only healthy, fully desulfated batteries
should ever be MAINTAINED in sets of 2 or more. Check each cell of ALL
filler cap batteries using an accurate, temperature compensated hydrometer.
Check sealed (no filler caps) batteries using an accurate, DIGITAL type
voltmeter, ONLY. The minimum voltage must not be less than 2.1 volts / cell
after fully charging battery and letting it “rest” for 12 hours minimum, before
testing. If battery voltage is less than 2.1 / cell you must first desulfate it until
you reach a “rested” voltage of 2.1 volts / cell.
Remember, you must desulfate each battery by itself (one at a time) before
maintaining them for extended periods. Attempting to desulfate more than
one battery at a time will yield very poor results, as the strongest (healthiest)
and not the weakest (most sulfated) battery will receive the majority of the
desulfation pulse energy.
ALWAYS test each battery individually to be certain it is healthy and free
of sulfate before attempting to charge or maintain them, either as a single
battery or in sets. NEVER connect multiple batteries together for
maintenance charging purposes using less than #18 Gauge insulated
wire or consider using BatteryMINDer Y-Connector Model 210AY with
SmarTECHnology*.
See diagram on the next page for the most common multiple battery
configuration.
*
BatteryMINDer ® has developed a simple, safe and inexpensive method of connecting
multiple batteries they call SmarTECHnology ® -Y. Using their single SmarTECHnology ® -Y
connector, two batteries can be maintained simultaneously using just a single output
charger designed to maintain batteries. Adding additional Y-connectors allows from
four (4) to eight (8) batteries to be connected depending on the maintenance charger
capability.