Relying on electronics is a fool’s game at best. The new term is “Death by GPS” but you could expand that to any technology in your Bug Out Bag that you are relying on. Remember, when it comes to gear “Two is One and One is None”.
Relying on or using electronic tools in a survival situation is a serious debate among the survivalist and the emergency preparedness crowd. Sometimes the usefulness of a tool might out weight risk of something going wrong with it, which is the case with the Kindle.