Just a quicky. I hope.
My N-gage (classic) will not startup with my 512MB Integral memory card inserted, unless I connect the charger. Doesn't matter how full the battery is, it will not boot up unless the charger is connected and switch on. This isn't a problem with other memory cards (I have a 128MB Kingston, original Sonic N and the Nokia Game thing), or with no card inserted. Different batteries don't seem to do the trick either.
Also, it's only a recent problem. I've had this card for about 3 months, and only in the last month has it done this.
It's probably something simple and obvious. It's not a huge issue, just an inconvenience when it dies (which it does) whilst at work for example. I hate not having MP3s on the bus ride home.