What Monte says is correct. Modern cars are so electrical dependent that they require multiple grounds along the length of the chassis.There are many modules along the length of the car that perform electrical "TASKS"and need their own ground. Have you looked at the + and - cables that come off the battery. They are not 1 or 2 gauge more like 4 or 6. Many of these cars have electrical problems that show up as mechanical/computer issues but most are ground related. Cars now have bus'( traffic lights that control the flow of computer info) that control the micro pulses of all the computers that run everything including the heater control valves and air supply dams. You would think that all those engineers would know better Remember that a car is a device that uses electricity to produce a function and rides on 4 very large rubber insulating blocks. Now back to the battery question. For stock eliminator, you must keep a battery in the factory location in the engine bay. I don't remember what size but any parts store will give the info for a battery that is used in a Honda. Smallest, lightest and cheapest.