... supply (two ways)A)Use the built-in lithium batteriesCharging ways: 1) connected car charger 2) ... full,red light off.Note: when used in lithium batteries, need according to POWEROFF key start or shutdown ... recording, old files will be covered)3)When lithium battery power is not enough, DVR screen "Low ... video3)Save formats:AVI4)Power supply: built-in lithium battery/car charger5)Support SD card, the ...