Canon PIXMA iP100 Portable Printer

I received my initial iP100 in early September. It was excellent in terms of its size, print quality, and being bluetooth and battery driven was the most convenient printing experience I have had to date. This printer had to be replaced after two weeks as it failed to recognise the presence of the black ink cartridge. Its replacement arrived on the 26th September and failed for the same reason today - 24th October. I am now awaiting its collection and eventual replacement. This is extremely inconvenient as life without a printer can be difficult. I can only hope for third time lucky! Changing to an alternative brand means sacrificing the cost of my bluetooth device so I feel imprisoned at the moment.