13354 Greenleaf Lane     Grand Haven, Michigan 49417     616.822.7587
   
 
 
   
 
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Battery Life Saver --- TEST

           Testing The Battery Life Saver Electronic Device

 This page is a technical page. You should have some experience as a mechanic and in handling batteries before you attempt to apply the data on this page.

If you don't have the experience, ask a friend who does to help you, or as a last resort, take your car to a garage and have it done.

WARNING!

BATTERY ACID IS VERY DANGEROUS IF MISHANDLED. ALWAYS WEAR SAFETY GOGGLES WHEN WORKING WITH BATTERY ACID. ALWAYS WASH UP WITH HOT SOAP AND WATER WHEN YOU ARE DONE. IF YOU SPILL ANY BATTERY ACID ON YOUR CLOTHES, WASH THEM IMMEDIATELY WITH HOT SOAPY WATER OR THEY WILL HAVE HOLES IN THEM THE NEXT DAY. BE SURE TO BE IN A WELL VENTILATED AREA.

You will need the following equipment to do the tests:

  • An accurate digital voltmeter. You can get one from Radio Shack. If you want the best get a Fluke.
  • A battery hydrometer. This is a device for measuring the specific gravity, i.e. the strength of the battery acid.

You should start the test before using BLS for the first time.

  1. Measure and record the battery voltage. It should measure approximately 12.7 volts. (This is assuming you are starting with a functioning battery.)
  2. Measure and record the specific gravity of each cell in the battery. (If you have a maintenance free battery, you are out of luck, you can't do this test.) The specific gravity of a new battery should be 1.300. If your battery is two years old, the specific gravity may be around 1.150 - 1.200. A battery in poor condition that is about to fail may be as low as 1.100.
  3. Record the date of this test. Save the report for later reference.
  4. Every 14 days, repeat steps 1,2 and 3. You will see the specific gravity gradually increase until it reaches that of a new battery.

State of Charge Charts for 12V, 6V and 8v Batteries-

 12 Volt Battery 
Digital Voltmeter
Open Circuit Voltage
Approximate
State-of-Charge
 at 80°F (26.7°C)
Hydrometer Average
Cell Specific Gravity
Electrolyte Freeze Point
12.65 100% 1.265 -77°F (-67°C)
12.45 75% 1.225 -35°F (-37°C)
12.24 50% 1.190 -10°F (-23°C)
12.06 25% 1.155 15°F (-9°C)
11.89 or less DISCHARGED 1.120 or less 20°F (-7°C)

6 Volt and 8 Volt Batteries

Digital Voltmeter
Open Circuit Voltage
6V-8V
Approximate
State-of-Charge
 at 80°F (26.7°C)
Hydrometer Average
Cell Specific Gravity
Electrolyte Freeze Point
6.33 - 8.55 100% 1.265 -77°F (-67°C)
6.23 - 8.30 75% 1.225 -35°F (-37°C)
6.12 - 8.16 50% 1.190 -10°F (-23°C)
6.03 - 8.04 25% 1.155 15°F (-9°C)
5.95 - 8.00 or less DISCHARGED 1.120 or less 20°F (-7°C)


Jan Watercraft Products
1334 Greenleaf Lane
Grand Haven,MI 49417

Battery Life Saver- Test
  Jan Watercraft Products, Since 2001
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