If you have access to used laptop batteries, they can be opened up and pull out the lithium 18650 cells - usually only one will be bad in the pack of a 'bad' LT battery.
There are tons of led flashlights that you can get cheap that use this battery(s), including the head-band type.
I have several white single-cell led flashlights, two red, two green, one UV, and even a 2-cell infrared (night-vision).
The ones I have the most of are Model # WF-501B ($8). I have a couple of 2-cell headband ones - they last for hours and hours on a charge.
Heck, I even got one to put in the glove box of every car, and one for every member of family to keep around house.
They even 'accessorize' - I got 'remote pressure switch' and velcro mounting bracket for a few.
They all last at least 2 hours on high, and several hours on lower setting - so bright I almost always use low.
The batteries don't 'run down' or go low when not in use - and you can buy chargers for like $5 - make it easy to 'top up' batteries before a hunt or a job.
Going this route has solved a few of the biggest aggravations for me, never being able to find one when I need it, cost, & battery life/longevity.
I haven't had a single cell go bad on me, in over 6 years I've been doing this; heck, I even have about 10 extra spare cells I keep charged up & ready.
I even recently bought a '4-cell 18650 holder' that I'm gonna use with an extra 12v 20,000 lumen LED light bar - as a portable utility light - it lights up a whole 10-acre field!

LedLenser makes an awesome 600 lumen headlamp for $70

This. I have this one. https://www.ledlenserusa.com/collections/rechargeable-headlamps/products/h14r-2-headlamp
Hand down the best I have used. 30-1,000 lumens with rheostat adjustable intensity. Flood or spotlight. Long lasting rechargeable battery. 7 year warranty. It is an awesome piece of gear. Only downside is it will set you back one Benjamin.