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high-quality HP Pavilion dv7-3160us Notebook AC Adapter Charger 19.5V 4.62A and 19V 4.74A compatible AC adapter power supply,7.4*5.0mm DC Connector works with HP Pavilion dv7-3160us Notebook AC Adapter Charger 1-year warranty and 30 days return.
The service and delivery were great. However, I purchased the extended life charger and have followed the instructions for breaking in the charger. So far, after three cycles, the "life remaining" indicator on my computer only reads 3 hours and a few minutes available on the charger not any where close to the 6 hours advertised.