We’ve all been there, on a night out, when your mobile phone dies right as you’re trying to phone for a taxi. You can try and carry around a gizmo like Proporta’s emergency charger, but what are the odds you’ll remember to charge that up? The only reasonable answer lies with Philips.

They’ve developed a confusingly-named Xenium 9@9 mobile, which has TWO MONTHS OF BATTERY LIFE. That…