1) CREE XML-T6 1200LM 5 Mode LED Focusing Flashlight Black

1200 Lumens, as bright as car headlights if not even brighter. Brightest of, all along with flashlight number 2, but this one is focusable, requires 2 18650 batteries, 5 modes.

2) CREE LED XM-L T6 1200LM 5 Modes LED Flashlight Electric Torch

Output is the same as flashlight number 1, it is smaller, non focusable, requires 1 18650 batteries, 5 modes.

3) Focusable 300 Lumens CREE Q5 LED 3-Modes Waterproof Flashlight Torch

300 Lumens, very focusable, waterproof, comes with adapter for 3 AAA batteries, but it can also be used with one 18650 battery. Beats the Nebo Readline both in brightness and ease of use.

4) Nebo Redline Tactical Flashlight Strobe S.O.S 220 Lumen

220 Lumens, comes with the 3 AAA adapter, cannot accept 18650 batteries. Focusable, 5 modes.

5) 7W 300 Lumens Mini CREE LED Flashlight Torch Adjustable Focus Zoom Lamp

Everyone should have one of these. 300 Lumens, really bright, small and focusable. Only one mode. Works 30% better with 14500 battery, but it gets hot and drains the battery quickly. It is really bright with a standard AA battery as well, last at least 10 hours with the standard battery and it does not get hot.

6) Panasonic D Battery for size comparison only

7) 18650 Rechargeable Battery, 3.7 - 4.2 V

8) 14500 Rechargeable Battery, 3.7 - 4.2 V, same size as AA Battery

9) Standard AA Duracell Battery

10) Standard Eneloop AA Rechargeable Battery available at Costco with charger

11) 3 AAA battery adapter for Nebo Redline Flashlight, in some flashlights this set can be replaced with one 18650 battery (Not in Nebo Redline, but works in number 3 flashlight from the above)

12) Standard Duracell AAA battery

13) Standard Rechargeable Eneloop AAA battery available at Costco

14) Ultrafire Charger with 2pcs 3.7V - 4.2 V 3000mAh Li-Ion Rechargeable Batteries

This charger comes with 2 18650 batteries, but it is also able to charge two (2) 14500 batteries (AA equivalent in dimensions) and can charge CR123 batteries.