Lenovo already has the P780 with a 4000mAh battery which lasts for multiple days: http://www.gsmarena.com/lenovo_p780-5544.php http://www.gsmarena.com/lenovo_p

Lenovo already has the P780 with a 4000mAh battery which lasts for multiple days: http://www.gsmarena.com/lenovo_p780-5544.php http://www.gsmarena.com/lenovo_p780-5544.php