I played that game, though not as badly.

My phone started to refuse to charge. By the time I realised, and got it turned off, I was below 10%. I was also supposed to be meeting family in another city the next day.

Between bursts of power on to deal with things like directions to a shop to buy a new phone, I was down to 3% when I got the new one. Just enough to authorise a new phone on my Google account.

I now travel with a spare phone tucked away!