Why? I can see batteries being problematic for long-term survival, unless you know how to make your own. For short term I don't see a problem. You can get batteries with a shelf life of 10+ years, so it's not hard to be sure they are not dead when you come to use them. You can get torches (eg Zipka+) with burn times over 100 hours, so it's feasible to get lighting for a month or so.

What's your alternative? I have candles - I bought several hundred before I got into LEDs, and I still have most of them. However, they are a fire risk and they don't give out all that much light really. They take a lot of space and I wouldn't want to use them during an evacuation. Their main advantage is long shelf life.