Definitely can charge, adjustable DC power supply has constant current adjustable, this power supply after adjusting the current in 220v side add a timer and charger is not much different.
There are some adjustable regulated power supplies without constant current this adjustable power supply will be a little troublesome, the adjusted current will drop after a while, and the current needs to be adjusted several times to complete. These charging methods can only be emergency, adjustable voltage power consumption is much larger than the charger.
The adjustable power supply can be used to charge the bottle, but it should be controlled by a person, or it should be charged with a small current, and it should be manually turned off after it is full, and the battery is not very full. That is, the adjustable power supply can be used for artificial charging bottles. Pay attention to the power, the adjustable power supply is larger than 5a.
Adjustable power can be used to charge electric vehicles, but he does not protect the circuit, should pay attention to open an account, to the time to unplug, stop charging