Search query: charge car battery from the inside of car

Product: DEWALT 12V/20V MAX Car Battery Charger (DCB119) Charges all DEWALT 12V and 20V MAX Li-Ion batteries from a vehicle's power outlet
Enables batteries to be charged while driving to work or on a job site
Charges the battery in 1 hour or less, minimizing downtime
Automatic shut-off protects excessive discharge of vehicle's battery
Diagnostics LED indicator communicates status: charged, charging, power line problem, replace pack, battery too hot or cold DEWALT

Product: Wagan EL9796 Easy Quick Jumper In-Car Jumpstarter Charges batteries by connecting cigarette lighter to cigarette lighter
Works with all 12-volt automobile vehicles (standard voltage)
Charges a weak battery in 5 to 10 minutes
Green LED light glows when the battery is recharged eliminating guesswork
Extra-long 18-foot power cord makes it easy to reach from car to car Wagan multi