This is a hako Brand Product which made from high grade cells and highest quality parts. It is 100 percent compatible to original battery in all terms including its size, appearance and most important quality. Every battery has to pass strict quality control procedures including filtration and safety testing of voltage, capacity and battery core (body). Each battery also passes necessary authentication certifications like CE, ROHS etc. before leaving the factory, so you can be rest assured for its quality, durability and performance. Battery part no. model may not be printed on battery Label. In case of battery not getting charged you must check your adapter's output it should be same on Multi meter 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 E-mail: email@example.com support number 8860982364, we will provide satisfactory possible solutions. About ARB - ARB offers diverse consumer tech solutions including batteries, adapters, and more. We are passionate about excellence so that with every ARB brand purchase, you can expect to find quality materials, reliable performance, affordable prices, and great customer service! And thanks to our customers.