Damn - this is an IMPORTANT post!! I don't really understand how batteries work well enough, and also I have 'electrical glitches' that make them behave temperamentally for me. Any idea if a gadget like this would be good for the more electrically challenged of us? And how we might effectively use it? I am just about to throw out my new (6 weeks) old powerbank - phone shop fixed once already and said "battery shot". It's the same brand as Ploi's, and her last a good 18 months of daily use before the battery gives up its ghost. I have a shocking track record with them!