Important Charging Information
Any of the following actions will void the warranty!
Exposure of battery to gasoline or diesel fuel.
Removal of the battery’s top cover.
Removing or destroying the battery’s shipping date code.
Long Time Storage
If you are going to store your boat for longer than 60 days you
will need to take the following steps to prevent long term dam-
age to the SEA27.
1. Disconnect the battery from any power draining devices.
2. Do not leave a trickle charger on the battery.
This will
overcharge the battery. Use an AGM smart charger.
3. If you have components that need to stay powered during
storage, ie: car alarm system, you may use a battery tender
device. They have a regulated output that will monitor battery
voltage closely and keep the battery at peak voltage. Choose a
tender that has the ability to reduce charge to .05 amps (five
hundredths of an amp, not half an amp).
4. Do not store battery in a discharge state.
Battery Testing
Testing your SEA27 to determine its functional condition can
be done in two ways. The first is to test the open circuit
voltage of the battery to determine the state of charge
with a voltmeter. Testing Open Circuit Voltage means
testing the battery’s voltage with nothing connected to the
battery (disconnect one terminal).
Consult the chart below to compare your readings:
Having the proper
battery or amount of batteries for the system to be
powered is extremely important to the life of the battery.
When planning your power delivery system make sure you
have the right amount of battery power so as to not
discharge the battery too deeply during normal operation.
Even though the Stinger batteries have the best deep
cycling ability in the market, the deeper the battery is
cycled the shorter the life expectancy will be. This is evident
Typical Stinger SEA27 Cycling Ability
vs. Depth of Discharge
Depth of Discharge
100%
50%
30%
10%
Typical Life Cycles
400
800
1450
4000
If you have any questions, please discuss battery selection
with your Stinger dealer or contact technical support prior to
installation.
State of Charge vs. Open Circuit Voltage
State of Charge
100%
75%
50%
25%
0%
Open Circuit Voltage
12.85 volts
12.5 volts
12.2 volts
11.9 volts
11.6 volts
Proper Battery Selection
The second way to test the battery is by using a load tester
(usually available at your Stinger dealer or most auto service
centers). A load test is performed on batteries that are suspect
of having reduced output capacity. For example a battery’s open
circuit voltage tests good but the battery is unable to support a
load.
You have purchased the most technologically advanced
battery available for the extreme demands of the marine
environment. When properly installed and maintained the
SEA27 will provide years of trouble free service. Some of the
advantages you will gain by using the SEA27 are:
- Greater amounts of power available on demand for your
audio system, accessories and starting power.
- Freedom to mount in any position without acid leakage.
- Retains power for long periods of time during storage.
- Extremely fast recharge capability.
- More power per pound than any other AGM battery.
Congratulations!
Installation Tips
Caution!
Always wear safety glasses and follow the safety
guidelines below when working around batteries:
Note: The terminal design on the SEA27 allows the direct
connection of battery terminals without modification.
1. Always disconnect the negative (ground) cable first
when removing batteries.
2. Connect the negative (ground) cable last when
installing batteries.
3. Handle and Lift batteries with care. Ensure a good grip
before lifting.
4. Clean all cable ends and connectors with a wire brush
or emery cloth until shiny and free from oxidation or
corrosion.
5. Inspect battery mounting area to be sure it is clean and
free from objects that could damage the bottom of the
battery.
6. Replace any corroded connections or worn cables.
Replace or repaint any corroded hold-downs, shelves or
trays.
7. If installing batteries in a sealed battery enclosure make
sure to route tubing from the battery enclosure to outside
the boat and into open air. In the event of a charging
system malfunction, overcharging may occur and the
tubing will direct gases safely away from the passenger
compartment.
8. Use extreme caution when making cable connections
to the battery. Extensive damage and dangerous sparks
will occur if cables are crossed.
9. Tighten connections to a snug fit (do not overtighten).
Over-tightening can damage the battery and
VOID THE WARRANTY. Recheck connections occasionally
to ensure good connections.
WARNING:
This product can expose you to chemicals
including Lead and Sufuric Acid which are known to
the State of California to cause cancer/birth defects
or other reproductive harm. For more information go
to www.P65Warnings.ca.gov.
KEEP OUT OF REACH OF CHILDREN - WASH HANDS AFTER HANDLING
SHIELD EYES
EXPLOSIVE
GASES
CAN CAUSE BLINDNESS OR INJURY
NO
* SPARKS
* FLAMES
* SMOKING
SULFURIC ACID
CAN CAUSE BLINDNESS
OR SEVERE BURNS
FLUSH EYES
IMMEDIATELY
WITH WATER
GET MEDICAL
HELP FAST
DANGER
/
POISON
Proper charging is crucial for proper performance of the
SEA27. We recommend keeping the SEA27’s voltage
maintained at 12.8 volts (open circuit) by means of a
properly designed regulated charging system. If your
battery has been discharged well below the recommended
12.8 volts we recommend following chart to the right for
proper recharging of the SEA27. The charging times stated
are using an automotive Current Tapering Charger or
otherwise know as a Constant Voltage Charger. These
chargers are microprocessor controlled and will regulate
the charge voltage and current far better than the run of
the mill automotive power charger. Contact Stinger for
more information on how to obtain one of these superior
chargers.
Never use an inexpensive constant current or “trickle”
charger! These chargers do not have regulated charging
abilities. They can overcharge the SEA27 causing severe
damage to the battery. Even a small amount or .5 amp
from a trickle charger if left on after the battery is fully
charged will overcharge the battery. Overcharging will
overheat and dry out the electrolyte causing the battery to
fail prematurely. Overcharged batteries are not covered
under warranty.
An undercharged battery not only has a temporary
reduction in capacity, if left in an undercharged state or
continually undercharged, the capacity and life of the
battery will be permanently reduced. The battery warranty
does not cover batteries that fail due to undercharging. For
this reason we recommend that you keep the battery fully
charged at all times with a properly designed charging
system that charges at 13.8 volts for float/standby usage
and 14.5-15 volts in cyclic applications.
