In my local Poundland (Leicester) they have these in car Golf Caddy chargers so you can charge you Golf Caddy in the car if you are and need a top up. Or just generally on the go. For only £1 they seem brilliant.
They are endorsed by Christy O'Connor snr (whoever that is) and i think this particular one was on Dragons Den? (Dont quote me on it)
Just thought if it helps out 1 person with the Golf Season coming up it was worth posting.