Challenge:How can you pack for a 3 day trip to Europe in a very small suitcase/sachel bag?

Since I posted on here how I managed to fit 5 days worth of stuff into a small cabin suitcase (Easyjet sized),that post made me think of something,is it even possible to do away with having a suitcase at all (cabin and hold suitcases)?

Can you live without a charger on holiday (as an experiment)?

I've been curious about this ever since I got my new smartphone,the Samsung Galaxy S5 as it now has an interesting new feature called 'Ultra Power saving' (bit of a mouthful I'll admit but that's what they call it) which can make your phone last up to a day on 10% charge or 12.5 days on a full battery charge.Read more here.