Hi,
confusing.
* You say you had a charger --- but then you bought a power supply (SDN..) which is different to a charger.
* Then you write "the charging device says 'current too high' " I wonder what this "charging device" is that can speak. ... or "prompt a message".
* Parallel resistor is no good idea.
*****
It seems you don´t know the difference between charger and power supply.
A charger controls the charging current. This charging current depends on battery type (chemistry) charging technology, time, charging status, battery voltage, maybe temperature, age and other parameters.
A power supply usually is made to deliver constant voltage, independent of load current. And it is rated for a maximum current. Usually the user is responsible to keep the load current below the powersupply_rated_current.
It´s not a simple task to create a charger from a power supply.
Klaus