SHAREHOLDER ALERT: Levi & Korsinsky, LLP Announces Investigation into Possible Breaches of Fiduciary Duty by the Board of Power

  SHAREHOLDER ALERT: Levi & Korsinsky, LLP Announces Investigation into
  Possible Breaches of Fiduciary Duty by the Board of Power-One, Inc. in
  Connection with the Sale of the Company to ABB

Business Wire

NEW YORK -- April 23, 2013

Levi & Korsinsky is investigating the Board of Directors of Power-One, Inc.
(“Power-One” or the “Company”) (NasdaqGS: PWER) for possible breaches of
fiduciary duty and other violations of state law in connection with the sale
of the Company to ABB.

Click here to learn more about the investigation
http://zlk.9nl.com/powerone-pwer/, or call: 877-363-5972. There is no cost or
obligation to you.

Under the terms of the transaction, Power-One shareholders will receive $6.35
for each share of Power-One stock they own. The transaction has a total
approximate value of $1 billion. The investigation concerns whether the
Power-One Board of Directors breached their fiduciary duties to stockholders
by failing to adequately shop the Company before agreeing to enter into the
transaction, and whether ABB is underpaying for Power-One stock, thus
unlawfully harming Power-One stockholders.

If you own common stock in Power-One and wish to obtain additional
information, please contact Joseph E. Levi, Esq. either via email at
jlevi@zlk.com or by telephone at (212) 363-7500, toll-free: (877) 363-5972, or
visit http://zlk.9nl.com/powerone-pwer/.

Levi & Korsinsky is a national firm with offices in New York, New Jersey and
Washington D.C. The firm has extensive expertise in prosecuting securities
litigation involving financial fraud, representing investors throughout the
nation in securities and shareholder lawsuits. The attorneys at Levi &
Korsinsky have been appointed by numerous courts throughout the country to
serve as lead counsel on behalf of shareholders in major securities lawsuits
and have successfully recovered multimillion-dollar damages awards on behalf
of investors. For more information, please feel free to contact any of the
attorneys listed below. Attorney advertising. Prior results do not guarantee
similar outcomes.

Contact:

Levi & Korsinsky, LLP
Joseph Levi, Esq.
Eduard Korsinsky, Esq.
Tel: (212) 363-7500
Toll Free: (877) 363-5972
Fax: (212) 363-7171
www.zlk.com