Hi, List, I have had my mPower BN BT 18 transplant since the first. I have been getting acquainted with its characteristics and quirks. In the options menu, support information mode, c and d, the available charge and last measured discharge read 1532. In the manual, in chapter 2, about the battery, it gives examples of 9800 and 16,000 respectively. My old classic started its life with around 30,000 and ended with about 22,000 available. Should I be overly concerned about this very large difference between the two machines? Without reading through the CD tutorial again, I can't give the figures Jonathan stated, but they were definitely much higher than 1532. Yes, I charge the machine to 100% and I plug it in when it's down to 10% but I can't give you a guess as to how long a charge lasts in hours. I don't believe it's anywhere like twenty hours though. I wish this had an item somewhere which would indicate how long a particular battery charge has lasted. Thanks for any and all help! Kathy
