A battery charger has a particularly advantageous application in the field of
mobile
radio terminal batteries. The charger generates an output voltage and an output
current for charging a battery and includes a first regulator, a second regulator
for regulating the output voltage to a predetermined value, a detector for detecting
the output current, and an activation system which assumes at least two states.
In a first state it activates the first regulator when the detector detects a negative
or positive output current, and in a second state it activates the second regulator
when the detector means detect a substantially zero output current.
