N2Power Announces DC-DC Power Supplies

SIMI VALLEY, CA, Jun 29 (MARKET WIRE) --
N2Power, a Qualstar Company (NASDAQ: QBAK), today announced its first
DC-DC power supplies. The XL125 DC-DC and XL160 DC-DC families are
specifically designed for OEM applications where very small size, high
efficiency and reliability are critical.

These new DC-DC power supplies complement the AC versions of the same
families that are particularly popular with telecom systems manufacturers.

90% power efficiency is achieved utilizing N2Power's unique "green"
packaging technology. The XL125 DC-DC and XL160 DC-DC families deliver
more power in less space, while reducing wasted input power and lowering
cooling requirements. These unique designs leave the heat in the load, not
in the power supply, reducing power consumption, improving reliability and
lowering cost of ownership.

"Our OEM customers requested DC input versions of our successful AC
designs," said Randy Johnson, N2Power Business Unit Manager. "They want to
extend the benefits they have gained buying our AC power supplies to their
DC requirements."

The new XL125 DC-DC and XL160 DC-DC families offer designers an extensive
range of capabilities. Fourteen dual-output and tri-output models deliver
options from 3.3 volts to 48 volts. N2Power supplies meet a full range of
international agency requirements, including RoHS, UL, CE Mark and FCC
Class B.

N2Power's products are sold worldwide through its network of
representatives and distributors. Sample units are available. Call
805-583-7744 or visit www.n2power.com for further information.

About Qualstar Corporation

Qualstar manufactures automated tape libraries and power supplies. Its
products are known throughout the world for energy efficiency and rugged,
Simply Reliable designs yielding years of trouble-free operation. Qualstar
tape libraries are sold, installed and supported worldwide to backup,
archive and protect data from incidental and catastrophic loss. Its
N2Power brand switching power supplies are sold worldwide to OEM
manufacturers who require both industry-leading high power efficiency and
very small size for their products. Qualstar Corporation is publicly
traded on the NASDAQ National Market under the symbol QBAK. More
information is available at www.qualstar.com, www.n2power.com or by phone
at 805-583-7744.

Forward-Looking Statements

Statements concerning the future business, operating results and financial
condition of the Company are "forward-looking" statements as defined in
the Private Securities Litigation Reform Act of 1995. Such statements are
based upon management's current expectations and are subject to a number
of uncertainties that could cause actual performance and results to differ
materially from the results discussed in the forward-looking statements.
Factors that could affect the Company's actual results include the
Company's ability to increase sales of its tape libraries; rescheduling or
cancellation of customer orders; unexpected shortages of critical
components; unexpected product design or quality problems; and, adverse
changes in market demand for tape libraries or other Qualstar products.
The Company undertakes no obligation to publicly update any
forward-looking statements whether as a result of new information, future
events or otherwise. Further information on these and other potential
factors that could affect the Company's financial results or condition
are included in Qualstar's filings with the Securities and Exchange
Commission. In particular, reference is made to the "Risk Factors"
section of the Company's Annual Report on Form 10-K for the fiscal year
ended June 30, 2008, and to the "Management's Discussion and Analysis of
Financial Condition and Results of Operations" sections of its Form 10-K
and its most recent Quarterly Report on Form 10-Q.

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For more information, contact:
Bob Covey
Qualstar Corp.
805.583.7744
Email Contact

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