Just received my Dorado 21700 440L 48V 20AH from Shanghai Aijiu Energy Technology Co., Ltd.that fits my Pedego Element perfectly. Was a pleasure working with Jenny and shipping to Los Angeles was less than 5 days from ship date. This battery has doubled the range of my Element coming from the Pedego 10ah battery to this 20ah battery. Thanks to Jenny and all in this forum for the excellent info.