Dash cam charging typically uses typically hardwired to a 12V car outlet, not battery-charged. Most dash cams run continuously off the vehicle’s 12v system rather than an internal battery, so ‘charging’ really means the car being on or a hardwire kit tapping constant power.
What to know
Check the connector and rough wattage on the original charger before assuming a generic one will work well for a dash cam — small devices are forgiving, but power-hungry ones like projectors are not.