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新的便携式设备需要选电池电量管理和充放电芯片，电池容量大概2000到4000毫安时，使用usb口充电，器件封装不要太小难于焊接，最好能通过单片机进行简单的配置调试就能使用的，BQ34Z100-G1如何？
几节电池？
充电电流要求多少？
