Can I replace battery of My HP Pavilion DV6 2020e notebook to work for 3-5 hours?

Question

I bought HP Pavilion DV6 2020e notebook from 6 months and i found that its battery last for max 70 minutes and i contact hp support and they told me that this model can last for max 90 minute according to its 6 cell battery :(

Can any know if this model battery can be replaced by one that can last for 3-4 hours ?

Answer 1

1) HP Document: How to Improve the Performance of the Battery
2) If that is not enough buy an Extended-Life Battery
     – The 12 cell should give you around 4-5 hours battery life.