Laptop batteries have some finite life of 18 months to maybe 500 cycles. More cycles such as discharging fully only wears it out more.
Does a new battery do the same?
Mobile Meter shows that my battery has 30% wear off level! (and it indeed stands for only 1 hour of use)
How can I improve my battery life???
I have calibrated it two times so far (let it comletely discharge and then charge again) but this didnt help.