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Discharge tests of 9 Volt transistor radio style Batteries |
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Testing 9 Volt Batteries
Method
1. New
Batteries are purchased from a retailer to make sure they are fresh.
2. This test is not to compare batteries for normal
operation, they are designed for very low current draw and these tests are for high current draw. This information is to help
design engineers know what to expect when the batteries are used under these circumstances.
3. The performance rankings
may be different for low current applications.
| Summary of tests, see discharge curves
below |
| Size |
Brand |
Code used in Graph |
Date of Test |
Sell By Date |
Termination voltage used in test |
Amp-Hours at 100 mA Discharge rate |
Amp-hours at 500 mA Discharge Rate |
Amp-Hours at 1000 mA Discharge Rate |
| 9 Volt Alkaline |
Duracell Coppertop |
DC |
April 2006 |
March 2010 |
0.1 Volt |
310 mAH |
170 mAH |
90 mAH |
| 9 Volt Alkaline |
Duracell Procell |
DP |
April 2006 |
March 2009 |
0.1 Volt |
310 mAH |
170 mAH |
90 mAH |
| 9 Volt Alkaline |
Energizer Industrial |
EI |
April 2006 |
2009 |
0.1 Volt |
450 mAH |
330 mAH |
230 mAH |
| 9 Volt Alkaline |
Nuon |
NU |
May 2006 |
Aug 2013 |
0.1 Volt |
490 mAH |
280 mAH |
300 mAH |
| 9 Volt Alkaline |
Rayovac Industrial Plus |
RI |
May 2006 |
Dec 2010 |
0.1 Volt |
440 mAH |
290 mAH |
140 mAH |
| 9 Volt Carbon Zinc |
Panasonic Super Heavy Duty |
PS |
May 2006 |
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0.1 Volt |
52 mAH |
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Here are the discharge curves at 100 mA. I have thrown in a Panasonic Super Heavy Duty carbon-zinc battery, it
obviously was never meant to be discharged at 100 mA.
The two Duracell batteries are now almost identical, |
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The first thing to realize is that 9 volt batteries were never designed to operate at 500 mA. This test was
for a special project.
However, it is evident that some 9 volt batteries are better than others at this high
current.
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Again, these curves are really ugly, since 1 amp is a lot for these transistor radio style batteries. It looks
like the EI battery started to loose the connections between cells at the high temperature |
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PowerStream Technology: 140 South Mountainway Drive, Orem
Utah 84058
Phone: 801-764-9060, 9062, 9063, or 9064
Fax: 801-764-9061 |
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PowerStream Technology
140 South Mountainway
Dr.
Orem, UT 84058
Phone: 801-764-9060, 9062, 9063, or 9064
Fax: 801-764-9061
Map &
Directions |
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