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7700 BATTERY SAFE OPERATION
INSTALLATION
1) To provide maximum reliability, charger must be installed in a well-ventilated area, so that free
airflow is not restricted through the side intake and exhaust vents.
2) Check polarity of battery posts. Positive (POS, P, +) and Negative (NEG, N, -). Attach
positive (red) charger lead to the positive battery post. Attach negative (black) charger lead to the
negative battery post.
WARNING:
Do not disconnect DC charger leads during charging. Damage to the charger could
result and void the warranty.
WARNING:
Do not connect DC charger leads if the charger is connected to AC power. DC
charger leads must be connected first.
COOLING TIME
Although it is not necessary, if the batteries are allowed to cool back to room temperature after being
charged, you will get more life out of the batteries and charge cycle.
BATTERY GENERAL INFORMATION
Batteries are designed to withstand high continuous shock load. They can be safely laid on the side,
although keeping them upright at all time is suggested. Batteries are heavy, each battery is 89
pounds/40.5 kilograms. Get help to remove batteries if weight is too much or you are under lifting
restrictions. Do Not Drop.
When batteries have used their full life, they are recyclable at locations all over the US and Europe. Call
National for recycle center. Batteries should only be maintained by certified National Technician.
Batteries are lead acid constructions. If packs are allowed to reach temperatures above 125° F,
ventilation can occur and discharge explosive gases (see warning label). How is this done wrong?
Improper charger’s or improper connections, allowing for direct short.
BATTERY FREEZING
Freezing of the batteries will not be covered by warranty. Even though there is no liquid in the batteries,
allowing batteries that are discharged below 75% to sit in temperatures below 20° F for more than twenty
four hours can freeze. The colder the temperature the faster they will be damaged. Always recharge
batteries before allowing to sit in cold temperatures or, hook to charger when conditions permit. This
charging system can be left on the batteries (maintenance mode) for long periods without damaging the
batteries.
SHIPPING
Unlike flooded cell or gel cell batteries, these batteries have no liquid in them so they can be shipped by
air freight.
BATTERY WARRANTY
Six Month warranty stamped on battery case and on label. All warranty is null and void if battery
container is tampered with or opened. Replace/maintain only by a National certified technician.
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