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Flashlight Battery Testing

I heard 20 years ago that LED bulbs are 100x more efficient than old style bulbs.

And yet these days I feel like LED bulbs are lasting similar time to old incandescent bulbs used to.

And also batteries are draining with LED bulbs similar time/usage that old devices used to.

So what gives?

I presume old marketing worked on me and LED bulbs aren't that much more efficient?

Or else some industries and manufacturers and products are eating up those efficiencies by just making devices and products less efficient?

Don't know.

And so especially.

I want to test flashlight and batteries.

I got these store-brand AA batteries:

https://www.acehardware.com/departments/lighting-and-electrical/batteries/household-batteries/F012386?variationProductCode=3284817

I have this flashlight:

Radiant® 3-in-1™ LED Mini Flashlight

https://niteize.com/radiantr-3-in-1tm-led-mini-flashlight

Note: the packaging says this Nite Ize flashlight can go for 2 hours on high setting.

I also got these name brand AA batteries:

https://www.acehardware.com/departments/lighting-and-electrical/batteries/household-batteries/F012393?variationProductCode=32886

~

Test #1:

- So now I start the nite ize flashlight on high setting (80 lumens setting) with 1x store brand AA battery in it.

- I will see how long (how many hours) this store-brand battery lasts.

- Note: after about an hour, i noticed the flashlight battery cylinder area (not the bulb area) is warm.

- Thus feels like the battery is warming up and creating energy to power that light beam!

- Pic:

-

-

- 7h.45m. later. the battery is off/spent.

- however i was asleep so I didn't see the exact minute/hour it was spent.

~

Test #2:

- So now I start the nite ize flashlight on high setting (80 lumens setting with 1x name brand AA battery in it.

- 00:36 to 07:05

- 6h.29m. later the name brand battery is off/spent.

~

Test #3:

- i was sleeping for the previous test, so now i monitor it and test it again with a fresh store brand AA battery.

- So now I start the nite ize flashlight on high setting (80 lumens setting with 1x store brand AA battery in it.

- 08:22 to 15:19

- 6h.57m. later the store brand battery is off/spent.

In conclusion, the name brand battery lasted 6h.29m. and the store brand battery lasted 6h.57m. So it was close. The store brand won. Well in conclusion I am shocked. Because I had thought the name brand would last longer in this case because it was more expensive unit price. But I was wrong.

#0169, lemonmama.com, by author Zesty Snooper, with commercial interest, 2025-11-07.