Go to Amazon Sites : br br ACER Aspire 5536-5142 Laptop Battery - Premium Bavvo? 12-cell Li-ion Battery br br High quality brand-new Li-Ion battery111V8800mAh12 cells br 30-Day Money Back Guarantee 1 Year Warranty br OEM compatible High capacity battery certified by CE and RoHS Guaranteed to meet or exceed OEM specifications br Before purchase please make sure all the technical specifications and the model No match with your laptop battery br If your original battery is a 6-cell battery this 12-cell battery has much higher capacity and works longer hours after each charge However it is bigger heavier and sticks out due to the extra 6 cells It will still fit in your laptop