I have a key meter for the eletric, about a month ago i noticed the display saying how much you have left ect was off. so rang them up saying bla bla .. they sed ring back when eletric goes off.. as cant get a engineer out till then.. its been a month now and i know for deff if it had been working ok ..the eletric would of needed a top up weeks ago.. so i got 2 options ..first..ring them back saying i rang about amonth ago stating that the battery in the meter went off and cant see how much i have left ..( i know would be nothing ) or say nothing and get free eletric.. but if i do that ..will they bill me once the new battery is replace..or will it show how much i have used sice the battery is dead