Head Light Replacment

After wiring up a head that uses a car led light
I found at my local "Princes Auto" Store

I had used a battery set from a remote control
John Deere Bulldozer, it was only 9.6v at 800 mAH
not as bright as I wanted it to be but at lest people
please could see I was there

And I now have a LiFePO4 12v 20ah
it is 30 percent brighter
too bad the battery dose not fit in the glove box

it's size is 180m * 140mm * 75mm

it is fat bugger but it definitely an improvement
over the other battery