best long battery life smartphone

{"title":"Stock 4400mAh BM4C Mobile Phone Battery for Xiaomi MIX Batteries in Black","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/8c\/5c\/e56bf9d5a7ad0909d6dab15b052a-200x200-1.jpg","attrs":{"Price":"$3.19\/pieces","Brand Name":"LongHeHui OEM","Model Number":"BM4C","Minimum Order Quantity":"5","Place of Origin":"Guangdong, China","Certification":"ISO ZQ","Rechargeable":"RECHARGABLE","Use":"Mobile Phone","Type":"Rechargeable Batteries","Color":"Black, White","Products Status":"Stock","Compatible Brand":"For Xiaomi","Mobile phone models":"MIX","Mobile phone models":"Mi MIX","Coding":"BM4C","Protection":"Double IC Protection","Capacity":"4400mAh","MOQ":"500PCS","ODM\/OEM":"500PCS","Warranty":"1 Year","Quality":"Ori 1:1 battery cell"}}

{"title":"Strong Magnet best car GPS Tracke long life battery for vehicles Free Platform With Mobile Phone APP 20000mAh Battery","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/3b\/f7\/44d6a941b36f84f61c504aae9430-200x200-1.jpg","attrs":{"Price":"56usd","Brand Name":"Rysmart","Model Number":"LK209B","Minimum Order Quantity":"10 pcs","Delivery Time":"3-5 working days","Place of Origin":"China","Supply Ability":"20000pcs per month","Packaging Details":"gps tracker nuetral package","Color":"Black","GPS type":"GPS Tracker","OUT power":"60-80ma","battery":"20000mha","Magnetic":"Strong magnetic","Dimension":"120mm x 65mm x 50mm","Battery Life":"30 Hours & Up","Warrenty":"1 year"}}