Electricity top-up cards

[BennyCake]

I'm thinking of paying the electric through one of those top-up/swipe cards, rather than the usual quarterly bill. Thought it might be easier managed than getting a big bill every quarter.

Does anyone use the top-up card? Is it rate cheaper than paying a quarterly bill? Any info would be much appreciated.

[armaghniac]

Some previous discussion in this thread http://gaaboard.com/board/index.php?topic=23827