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Why we believe all our batteries are the best on the
planet |
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Custom
design and manufacture of state-of-the-art battery
chargers, DC/DC Converters, battery packs and power supplies for OEMs in a
Hurry
We know that it is risky to try a brand of batteries that
is not name-brand. Discount batteries often disappoint. That is not the case
with PowerStream batteries. Let us explain.
We at PowerStream have been
designing custom battery chargers for years. We have an extensive test facility
in which we can evaluate batteries and battery charging algorithms under all
kinds of conditions.
One day we got in a batch of NiMH batteries to test
from a no-name manufacturer. They were so superior to the name brand batteries
that we were testing at the same time that we were surprised. We contacted the
manufacturer who offered distribution rights to us and gave us surprisingly
good pricing.
All batteries are made in factories with ISO9002
certification and extensive quality control and manufacturing control. Ten
percent of their staff is devoted to quality control at all
levels.
Unlike many no-name factories, who have a recipe and follow it,
our partners maintain a vigorous R&D effort to improve the capacity,
lifetime, and consistency of their products.
Technical details of the quality of our
batteries:
All battery packs are made with matched batteries
to prevent early failure due to cell reversal. The cost of doing this for us is
very low because of the extreme consistency of our cells.
We know that
one size does not fit all. Batteries are always made with tradeoffs. The most
important are size, price, capacity, and maximum discharge current. Our
partners are willing to modify their process to better serve your requirements.
For example if you need 50 amps of discharge current we would reduce the
amp-hour capacity to make a cell with lower electrode resistance. If you only
need 1 amp of discharge current we could increase the amp-hour capacity.
Similarly it is cheaper to get 1 amp hour out of a large battery than a small
battery, so flexibility on the part of the battery manufacturer can be
important.
The following chart shows the quality of the PowerStream NiMH
4/3 Fat A cell, which is rated at 3850 mAH.
| Current |
Measured run time |
Expected run time |
Ratio |
Equivalent AH |
| 0.525 A |
440 |
440 |
1 |
3.85 |
| 1.02 A |
226 |
226 |
1 |
3.85 |
| 1.5 A |
150 |
153 |
0.98 |
3.78 |
| 2.0 A |
114 |
115 |
0.99 |
3.80 |
| 2.5 A |
91 |
92 |
0.98 |
3.79 |
| 2.98 A |
75 |
77.5 |
0.97 |
3.72 |
| 3.5 A |
64 |
66 |
0.97 |
3.73 |
| 4.0 A |
56 |
57.8 |
0.97 |
3.73 |
| 4.5 A |
50 |
51.8 |
0.97 |
3.72 |
| 5.0 A |
44 min |
46.2 |
0.95 |
3.67 |
In this chart the "expected run time" is what
you would expect if you took the capacity measured at a C/20 discharge rate and
divided it by the the discharge current. You can see that even at 0.77C, the
PowerStream cells are still up to 95% of their 20 hour capacity. This indicates
a high quality, well constructed cell that was designed for high current
capability.
For a chart of the sizes
and weights of cylindrical batteries click here:
For more battery
engineering resources click here:
Note: We don't
inflate our specifications as many companies do. The capacity in amp-hours is
guaranteed, and will be exceeded most of the time. "Usable cycles" is a
guideline, but not guaranteed because we have no control over abuse of the
cells. |
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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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© Copyright 2000,
2002, 2003, 2004, 2006 Lund Instrument Engineering, Inc. All rights reserved
This material is copyrighted original work. It is forbidden to use
this information, text, or graphics in full or in part on another web site
without written permission. |
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