Hello, I just bought 4 new 3500mAh 18650 HIGH DRAIN Orbtronic 3.7V Li-ion Rechargeable Batteries FLAT Top Hybrid IMR battery cells for my
acebeam k70. I’m hoping not to get down step in lumens with these cells. Well they make a differnce?
No matter how good the cell, you will always get a step down in lumens due to voltage sag, heat, and if the light has a built in step down after a certain amount of time or heat, it will step down regardless how powerful the cell.
I often look on this website to compare batteries, have a look at the output graphs. You can compare one against another at various discharge currents.
http://lygte-info.dk/review/batteries2012/Common18650comparator.php