I have a 505 and only charge it through the USB port of my laptop. I recently got a message "no battery" on restarting it. The evening before when I turned it off the indicator showed half charge. I did a reset and am now recharging it via USB. I have a three questions: 1 what does the message "no battery" mean? I understand "low battery" but not "no battery. 2. Apart from charging faster with a mains charger, is there any difference between charging with charger and via USB? 3. Can I use my Motorola phone charger? It has a micro USB connector and output of 5.0V 550 mA. I asked Sony and they just said they could not recommend anything other than Sony products. Fair enough, but I'm tired of buying chargers for everything.
