Save your cell phone battery while out in the sticks
Your cell phone tries to keep you constantly connected to the grid. When you are off the grid your cell phone will try every few minutes to find a tower. This hunting for towers is a large drain on battery life.
If you know you’ll be away from cell towers for a few hours, pop your battery until you reach civilization again. Otherwise it might be dead when you get there.
If You’re Out of Cellphone Service for a Long Time, Remove Your Battery – Consumerist
If you have a phone you can’t remove the battery from it might keep calling home and stick you with a $4800 bill from ATT
