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Model number: NBBA-SOBPL4
SONY 9 Cell extended life primary battery is exclusively designed for the VAIO AX and BX series and comes with a charge indicator at the back. Extend the amount of time you can use your notebook by more than 1.5x the standard capacity battery. Perfect for lengthy meetings, flights, train rides, work or play. Battery power gives longer portability around the house, in the office and when traveling.