hello, a customer ask me that I always use RD power supply to charge battery, how about the old models, yes RK/DPS power supply can charge battery as long as the charging voltage in output range, just notice that do not reverse battery connection
RK6006: RD RU RIDEN RK6006 RK6006BT 60V 6A Abwärtstransformatormodell DC-DC - AliExpress 1420
DPS5020: RD RU RIDEN DPS5020 50V 20A DC DC Abwärtsspannungsversorgungseinheit - AliExpress 1420
if you connect battery in wrong way, the fuse will be burned, you can take the fuse out and use the backup fuse into the socket, then it should work again
RK6006: RD RU RIDEN RK6006 RK6006BT 60V 6A Abwärtstransformatormodell DC-DC - AliExpress 1420
some customers may misunderstand the OCP value, they think the current decrease to this value, the output will be cut off, actually it is over current protection, if your real output current higher than this value, the output will be cut off and show you the reason