Buy the Razer RZ09-0330 RC30-0328 15.4V 4221mAh Laptop Battery for Razer Blade 17 RZ09-0220. It is certified by CE, UL, ROHS, ISO9001/9002 to ensure high-quality and standards. The battery has a longer lasting life and standby time. It is 100% compatible with your laptop and comes with a 1-year guarantee and a 30-day money-back refund.