This is a brand new Sony PCG-61311L battery. This battery is rated 11.1 volts and 5200 mAh and will normally last 3 hours on a full charge. You can get even longer battery life by dimming your screen and closing unused programs and applications.
We use the highest quality lithium-ion battery cells that charge faster, last longer and weigh less than cheaper, lower quality batteries. Lower quality batteries can wear out in as little as 6 months. Our batteries can last up to 5 years.
You can expect about 2 - 3 hours of run time with this Sony PCG-61311L battery when new, depending on your energy use. The higher capacity battery cells inside this cartridge have an energy capacity of 5200 mAh.