MECO 3.7V 1200mAh Rechargeable 14500

LED Flashlights – General Info 1 x AA / 1 x 14500 Flashlights
7

For high drain, i think the best are still ‘WindyFire’ 14500.
http://www.windyfire.com/windyfire-imr-14500-650mah-37v-10a-discharge-rechargeable-battery-button-top.html
HKJ test: Test/Review of Windyfire IMR14500 600mAh (Red)