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Press Releases & Articles
April 28th 2008
Battery Restoration, Part 1
Batteries are vital in our society, an upper level in the scale of ability for humankind. They give us the power to store and manipulate energy. They are everywhere from...
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Feb. 25th 2008
Is Biofuel Craze a Mirage?
In September 2007, Lewis Smith, Environment Reporter for Times Online, warned us that we may need to jump off the biofuel...
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Jun. 10th 2007
Help With Batteries
Batteries are designed to help you. They store
energy for your use; they...
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January 7th, 2007
Stretching Your Golf Cart Battery Dollar
Battery prices are rising! To save money, a good strategy
is to make batteries last as long...
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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.
- Measure and record the battery voltage. It should measure approximately 12.7 volts. (This is assuming you are starting with a functioning battery.)
- 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.
- Record the date of this test. Save the report for later reference.
- 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
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) |