No wonder your current battery has a tough time of it! So with an extra battery on hand you can ensure that you never run out of power again. Also ideal as an emergency back-up or just to extend the use of your phone between charges. These replacement batteries are each designed & tested specifically for your mobile phone. The high capacity battery also enhances battery performance by offering a lower internal resistance for extended life over our standard battery. Our batteries are safe to use, identical in size & shape to the original manufacture's batteries and offer far better all-round value