A Chinese company named SoloMobi claims that a phone with a 16,800mAh lithium battery, yes 16,800mAh, will stay powered on stand by for a year. I seriously doubt it but a 16,800mAh battery is what I sure need in my phone. Typically, in any battery powered device, the higher the mAh, the longer the battery will last. I am not too educated on batteries so I may be wrong but this has been my experience. What is really cool, the company is rating the phone as a 3-5 day talk time. Could you imaging charging your cell phone every week instead of every night? Heck! Sometimes I have to charge my phone more than once a day. All information here was summarized from Engadget.com