Apple has apparently acknowledged that its perfect iPhones have a major flaw which causes them to go into what users call a coma mode.

For a while Apple had been sitting with its fingers in its ears going la, la, la over the problem which seems to affect all iPhone users. Forums have been packed with details of the fault which causes the battery light shows full while the phone drains itself. It then switches itself off for no apparent reason.

While fanbois have been rushing to news sites to report there is nothing wrong with their lovely machines Apple has been quietly contacting some customers to get first-hand reports on what may be causing premature draining.

Apple's support team has started contacting some customers who reported their battery problem to AppleCare, according to the enthusiast site and Apple's own forums. AppleCare is apparently asking customers to enable battery-life logging on the iPhone and then sync the logs to a computer.

Officially the outfit is telling punters that battery logging does not affect battery life itself, but that the logs do take up hard drive space.