Puredick New Laptop Replacement Battery Pack for Apple A1405 Battery (Early 2011 Late 2011 Mid 2012 Version) Unibody Macbook Pro 15"- 12 Months Warranty [ Li-Polymer 4-Cell 6077mAh,50Wh,7.3V] Premium cells: the Puredick battery is made of 100% Grade A cells (Sonny) for 6077mAh premium capacity and reliability instead of low grade or recycled cells, support long standby time. Built in advanced and high performance PCB: make it safe with overcharge & over-discharge, over-current & short circuit protection. Precision-engineered and rigorously tested for voltage , compatibility and safety, 100% OEM Compatible - Guaranteed to meet the specifications of the original device. Long cycle life: Up to 500 recharge cycles over the life of the battery which also extends the life of your laptop. High quality industrial material and certified: 100% New Components - never refurbished, recycles, or used, CE-/FCC-/RoHS-Certified for safety and come with 12 months warranty.