All batteries carry a warranty and usualy around 2 years, They can get it replaced from the manufacturer or their own supplier.
Nothing like this surprises me with ironics, There was a chap on here recently who was wrongly charged by them for a new CCTV camera, he got his new camera and his bill, after pluging it in found he had the same problem, We worked together on here and got his system working. Ironics told him his CCTV was faulty, its plain to see that they take us window cleaners for idiots.
watch it Jeff
they will be onto you tonight
i cannot wait to get home tonight

on a serious note, as jeff said, all batteries will have a warranty
they are just mugging you again

they read this forum and if rumours are true ( i dont know ), they have TWO plants currently posting on this forum ( just a rumour i have heard ), so you would like to think when then read this, you will get a phone call explaining its been a horrid mistake and you are really at home in kansas ( oh hang on, thats the wiz of oz ) what i meant was it was a mistake and they sent the bill out by mistake, you will then come back on here and tell us about it and what a great company they are

of course, if they dont do the above, you have every right to be pee'd off