N2Power Announces the XL260-2 ATX Quad-Output AC-DC Power Supply

SIMI VALLEY, CA, Jun 29 (MARKET WIRE) --
N2Power, a Qualstar Company (NASDAQ: QBAK), today announced the XL260-2
ATX, the first model in its planned family of ATX compatible AC-DC
switching power supplies. Delivering one 24V, two 12V and 5V outputs, the
XL260-2 ATX supply is designed to replace oversized and inefficient
ATX-format supplies used in OEM applications where very small size, high
efficiency and reliability are critical.

Leveraging N2Power's unique "green" packaging technology, the XL260-2 ATX
delivers more power in less space, while reducing wasted input power and
lowering cooling requirements. This unique design leaves the heat in the
load, not in the power supply, reducing power consumption, improving
reliability and lowering cost of ownership.

The XL260-2 ATX power supply is expressly designed for OEM applications
such as gaming, embedded systems and networking systems. The XL260-2 ATX
delivers 260 watts of output power from just 15.9 square inches of system
design real estate. Very low profile packaging yields more than 12.5 watts
per cubic inch power density in less than 1U, making the system designer's
job much easier.

"OEMs have requested a state-of-the-art replacement for outdated ATX power
supplies that provides both high efficiency and much higher power
density," said Randy Johnson, N2Power Business Unit Manager. "The XL260-2
ATX exceeds both requirements, and its small footprint means easy
integration into their legacy designs."

The XL260-2 ATX incorporates the same industry leading features as
N2Power's widely regarded XL125, XL160, XL275 and new XL375 power supply
families, including active power factor correction for reduced input
power, inrush current limiting and remote on-off. N2Power supplies meet a
full range of international agency requirements, including RoHS, UL, CE
Mark and FCC Class B.

N2Power's power supplies 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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