The 4 D cell one just happens to be a flash-light that makes a handy baton. The 6 D cell on and the item the OP linked is a baton that has a flash-light at one end.
Indeed it does!
I have only ever had one occasion to use such in such a situation.
And it makes an interesting story really (As regards the "reasonable force" thing)
Some 30 years ago (!) I was making my way back to my Car in Guildford, around 02:00 Hrs, wearing my Barbour and carrying my trusty 4D Maglite in a pocket thereof and a small voice came up behind me requesting whether I had any "Change"!
Now, I don't know about anybody else's opinions on this but I would (And did) consider this to basically mean "You have been Mugged"!)
How I reacted is quite interesting and I remember it in
great detail.
My first reaction was to stay still and glance over my left shoulder (Say a 45 degree turn) This gave me an idea of the height and distance of my assailant.
Once I had figured out where he was I grasped the Maglite (by the head end so it wouldn't slip out of my hand) and whipped round turning to look at my assailant straight in the eyes as I aimed to whack him at the top of his jaw just under his left ear.
(This was quite specific, I wanted to severely disable him, not kill him)
This is where it got interesting. The man was clearly totally terrified, he wasn't actually a mugger, he was actually just asking for change. I managed to stay my hand and the torch came to rest touching his cheek.
Unsurprisingly, He turned and ran.
Now, I wouldn't necessarily want to second guess other peoples reactions to high stress situations (I would always give a victims benefit of the doubt in a court case, even in the case of say Tony Martin)
But yes, It is actually possible for people who are in fear of their lives to still make rapid rational judgements. In my case this all took place in little more than a second or two.
And that night I made the decision to not realy hurt somebody who didn't actually deserve it