If your cell phone is not charged and..................................

It happened to me before. What i did was i rent my friends phone for the time being which is'nt much of a problem since we both had similar models. I usually check out the battery meter early in the morning which is not that hard. If i k.o early in the night that means i did'nt charge my h.p and if i watched too much 3gp movies i knew i would be in trouble. Currently i did not have that kind of trouble since i'm using a new phone with better battery life. It can be charged via its usb connection too. So my battery is always charged. I do notice one guy before who obviously had battery life problems. He carried his cellphone charger with him and i always saw him plugged in to an unused power outlet near the terminal where i catch the bus from. Perhaps you could emulate this strategy if you have battery life problems too.