The same will aply to the MAG 951 buy enough batteries to go thru your emergency and as a bonus you will get double the lumens!! and a few battery packs.
After all if you are willing to spend $9,96 every 20 minutes in you Surefire M-6 (that is $29.88 per hour) at $1.66 per battery (from Surefire website $15 plus $5.00 shipping for a box of 12) (a box will be good for 40 minutes) or buy in any store where you pay for them $4.00 or more each, you can well spend the money to buy several $24.00 rechargeable packs.
The benefit of course is that ONE pack will last 500 hours, while to get 500 hours out of your Surefire M-6 you will have to spend $14.940.00 in batteries.
$29.88 times 500
Don't worry, I have lived in this house in the Island for 24 years and only twice lost electric service for a few hours.
I was a follower of Mel Tappan and I have spend 30 years preparing for something that haven't happened yet.
It is a hobby and I enjoy it as that.
Now, I have discovered the flat delivery current of Nimhs batteries and I will not use anything else, I don't buy any more batteries at the store.
My radios, GPS's, flashlights, disc player toys, etc. in my house run in rechargeables Nimhs and I don't have spend another dime or polluted the soil with another alkaline for quite a while now.
Now, let me go, I have to go and get fill several 5 gallons cans of fuel as another storm is approaching and the prices are going to hit $5.00 soon.
black bear