Why choose rechargeable batteries over one-time use ?

I honestly don't know about the lumen ratings man. But the first ₹500 one was decent enough for my use. Only wish the range was longer and it has three levels of brightness.
You mean you want a longer throw.

How far would you say it reaches presently? Light should be 10% of what it is. That's how they measure it.

and how much further do you want it
The battery also doesn't last long.
That's why you need lithiums
No idea about the Shadowhawk walla. The video reviews seem to be favorable. The design of the two torches really look alike and the functionality too so I thought they both might be rebrands. But the Shadowhawk one costs 3x so I thought it would be much better than the Flipkart one.
Why don't you look for a proper torch?