Best Light for Power Failures

I was thinking that one area that I need to beef up is lights for when the power goes out. I have lots of candles, but I also don't like using them b/c of the cats. I'd like to get some LED lights that recharges through USB and have them on hand. I know they'll need to be recharged again but for a while, we can have safer lights. (And we can go over to the hospital to use their facilities to recharge as one option.) Any suggestions? I'd like to make sure we can see as we are older.