This brand new replacement battery is made with high quality battery cells , 100% compatible with your laptop. Our batteries are meet or exceed the original equipment manufacturer specifications (voltage, capacity, safety and compatibility), all of them have passed international certification( ce, ul, .), strict quality and safety testing( qa & qc) before leaving the manufacturer. And the battery shell was made of high quality environmentally friendly and fire-resistant materials. These batteries also have internal circuit boards with smart chips, which allows the battery to communicate with the laptop to monitor battery temperature, performance and output voltage. We will check the functions of the replacement battery before shipping, ensure every function works well since we understand the annoyances of dealing with defective products and want you to be 100% satisfied with our replacement laptop battery. Before placing an order please to ensure the model(or part number) of battery can fit for your laptop, you can compare your old battery to our battery's pictures, ensure them are the same. Note:- battery must be fully charged with over 8-12 hours for the first time use, first 3 charge/discharge cycles are very important to get actual performance.in case of battery not getting charged you must check your adapter's output it should be same on multimeter as laptop input power. Don't consider the battery is faulty, it may be fault in other parts of laptop also. Regarding any product issues customers can coordinate our technical team before sending the product return by will provide satisfactory possible solutions.