移动电源是什么（谁知道是什么原理）

{"rich_content":{"text":"电池变成充电宝，谁知道是什么原理","spans":null},"video":{"vid":"v028b0130000c0a4jc7i24mp7cjfvie0","duration":114.025,"width":1024,"height":576,"file_size":11386716,"thumb":{"web_uri":"tos-cn-p-0000/0690f007cef44386b4233bcbc7b96952","width":640,"height":360,"image_type":null,"mimetype":null,"encrypt_web_uri":null,"secret_key":null,"encrypt_algorithm":null,"extra":null},"video_size":{"high":{"duration":114.025,"file_size":11089212,"w":854,"h":480},"normal":{"duration":114.025,"file_size":7828833,"w":640,"h":360},"ultra":{"duration":114.025,"file_size":13253845,"w":1024,"h":576}},"is_encrypted":null,"sp":null,"md5":"6fa79b9bd3d8ac71ada3cf448d3908fa","tos_key":null,"secret_key":null,"encrypt_algorithm":null,"extra":null}}