http://genuineacadapter.com/power-adapter-fit-acer-aspire-v37314854-acer-19v-342a474a-5517mm-p-8227.html

Power adapter fit Acer Aspire V3-731-4854 Acer 19V 3.42A/4.74A 5.5*1.7mm

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$23.21

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Power adapter fit Acer Aspire V3-731-4854

Power AC adapter fit Acer Aspire V3-731-4854 notebook, brand new, 100% compatible with good quality, and free from defects in material and workmanship. 30 Days Money-Back, 12 months warranty. 

Fit with following laptop:

Acer Aspire V3-731-4854

Specifications:
• Type: Power AC Adapter
• Input Voltage: AC 100-240V~50/60HZ
• Output Voltage: DC 19V 3.42A/4.74A
• Max. Output Power: 　65W/90W
• Connector Size: 5.5*1.7mm (as pictures)
• Manufacture Guaranty: 12 Months
• Operate Environment: Please keep the environment cool and dry!