If you can afford it, get a battery like this that has the option of a solar panel or can recharge via your car or wall outlet. This battery can keep your phone or radio charged, power a small fridge, power laptops and tablets and even power an old record player if you've got one. Very small luxuries but worth it if the power goes out. Bigger batteries can do more, but your goal is to reduce your need on electricity in the long run if it will be "conditional" on a digital ID or compliance. There are some small heated blankets you can buy that this battery can charge for many hours. Also powers wi-fi and portable lights.