The battery in the Rayovac might actually only be 1800 mAh. That's what everything else in that price range is using. Still, not a bad starter light. Should work okay for frequent short term blackouts, but anything longer than a few hours on high and it's a paperweight. Need to plan for contingencies during emergencies like if the blackout lasts longer than the battery does and you can't charge it (even if you can, you need a light during the time it's charging). The headlights with the usb rechargeable lithium ion cell to replace 3AAA have close to the same capacity as the 18650 in the Rayovac, but if that battery dies you can still use AAAs. The 1000 lumen Energizer 18650 headlight is usb rechargeable (I think charging might be in the battery), but you can still use 2 123As if the battery dies.
The Sofirn headlight looks like a decent reasonably priced light with some good features, especially color temp. of l.e.d.. Personally, I do not use a lithium ion light on my head with cheap unprotected cells. (I'd use the batteries in a handheld light and replace with protected cells from Nitecore, Fenix, Klarus, Surefire, or Orbtronic). If it won't accept protected cells, I'd stay away from it. If the light is that close to my brain, I want assurances that it's not going to blow. That's my personal choice. It's your call on that one. Other than that, I'll say it looks good on paper. One other thing to look for in a product for emergencies is does it have a track record? Look for something that's been around for awhile and has endured and maybe been improved over the years and you'll know it'll last. That will however, cost more as you'll be getting into more quality products, not entry level. A Nitecore HC60 v.2 is going to cost more than a Sofirn, but I bet it will last way longer. People tend to go cheap for emergency preparedness. I think when that last piece of gear is the difference between life or death, it's worth spending a little extra to make sure it doesn't fail you. When you're trying to help others, I can understand trying to get them started with something that isn't total garbage in their budget until they realize they need to invest in something better.