We need the circuit you built, not just part of it! Arduino, sensors and all - a photo may be easier.
1A sounds drastically wrong. You are feeding 9V to the barrel jack? How are the LCD and proximity sensor powered? What current do each of those take?
[ BTW that circuit has a serious flaw - there should be a fuse on the +ve lead to the accumulator, preferably close to it - shorting out a large lead-acid battery is a recipe for burnt out cabling, buckled plates, large bangs and can start a fire ]