S E C T I O N 5
BATTERY MAINTENANCE
A. PREPARING TO CHARGE A BATTERY
1. Always turn off E-stop and key switch before work-
ing with the batteries.
2. Be sure the area around the stacker and the battery
is well ventilated while battery is being charged.
3. The battery terminals, connections and wiring
connections should be clean and free of corrosion.
When cleaning any of these components wear a face
shield or other suitable protective eyewear.
B. BATTERY CHARGING
Charging must be performed with the charger that is
provided with or prewired into the machine. During
charging, the temperature in the battery must not exceed
120 F. Charging simultaneously with truck operation
is not recommended. Plug the charger into a 115 volt
outlet. Charge until the battery gauge indicator lights
show fully charged (approximately 6-8 hours).
C. WARNINGS AND BATTERY INFORMATION
Avoid use of open flame near batteries. At temperatures
around freezing point, battery capacity is reduced by
30%. The battery terminals, connections and wiring
should be clean and free of corrosion. When cleaning
any of these components, wear a face shield or other
suitable protective eyewear. Read, understand, and fol-
low all battery and battery manufacturer's specific pre
-
cautions while working with and/or charging batteries.
D. BATTERY MAINTENANCE
To measure the voltage, use a digital voltmeter (DC) on
the battery poles. The truck must not have been in use
for the previous 30 minutes.
DANGER
Never alter the AC cord or plug provided. If it will
not fit outlet, have proper outlet installed by a quali
-
fied electrician. Improper connection can result in a
risk of an electric shock.
1. Disconnect the charger from the 115 volt wall out-
let once the indicators read fully charged.
E. CHARGER OPERATION
LED Instruction:
Red light on: Charge error (Voltage <11V)
Red flashing light: Battery reversed polarity
Yellow flashing light: No battery connected
Yellow light on: Normal charging
Green flashing light: 80% charged
Green light on: Fully charged
VOLTAGE
Approx. 12.7 V
Fully charged
Approx. 12.2 V
1/2 charged
Approx. 12.0 V
1/4 charged
Approx. 11.6 V
Discharged
Battery Discharge Indicator (BDI)
Operation
Here, second from left LED
blinks indicating reserved
power is above 70%
At this point we recommend
charging the system
Two leftmost LEDs blinking
indicate
EMPTY
RECOMMEND charging the system BEFORE the
BDI indicates EMPTY IN ORDER TO EXTEND
BATTERY LIFE
PRESTO OWNER’S MANUAL
Page 13
POWER STAK
