model is actually AH532
for anyone else getting this , I have received an email from Fujitsu support confirming this is normal behaviour and that the the battery will only top up charge when it drops over 10% drained

I have just bought a lifebook AH520 for my daughters University work, and have a question regarding the battery status If plugged into the mains and the battery charge is over 90% the battery meter says "plugged in not charging", the only way to get it to charge to 100% seems to be to unpl...