Replacement Battery Charger Kit for Vivitar DVR-390H DVR-410 DVR-525HD DVR-530 DVR-545 DVR-550 DVR-550G DVR-565 DVR-565HD DVR-710 DVR-7300X DVR-830XHD DVR-840XHD Vivicam 3930 4000 Digital Cameras Camcorders This battery charger is an AC wall and DC car two in one charger. Its unique flat pin, foldable design allows easy storage and makes it a compact battery charger. Smart charging LED indicator automatically turns to trickle charge after the battery fully charged. Auto switching power voltage is from 110V-240V Note it is an external battery charger only, not working as power cable or AC adapter.