24V LiFePO4 battery adaptor has CC/CV mode, specially designed for charing Lfp Battery packs. At the first stage of charging, it works at status of constant current and charge the battery very fast. After it charges the battery to about 90%, the adapter will shift automatically to the mode of charging at constant voltage, which will maintain 29.2V and charge the battery at small current, also known as trickle charging current, till the battery is fully charged to 100%. Our adaptors enbody a mini electric fans inside to blow the heat out so as to better protect the inner parts and has red/blue LED index to indicate the charging status.