10 pcs 18650 3.7V 3000 mAh Rechargeable Battery Li-ion Batteries for LED Flashlight Torch

This brand isn't the absolute best but they seem to last a long time.

I have used this brand before, not these specific batteries. They are okay if you don't need high discharge. I use mine in high power flashlight. Because they are not high drain, when half drained, they default to a lower setting. They still have power, they just can't deliver that power at a rate sufficient to produce 1000 plus lumens. The batteries I have from this brand will run a cheap "1000+" but actually 240-350 lumen china light for hours. I wouldn't put these in my emergency light but for household or work where you are always close to the charger or charged batteries? This brand should be fine. I'm in SE Asia right now and ordered some of these but my order from China got cancelled, grr. In no way would I suggest these actually will deliver 3000 mAh but they are a good deal as long as you use them in limited fashion and don't forget to rotate them. If you leave them in a drawer for a year, I expect most of them would be dead or nearly. They are cheap power and they are what they are.