EVVA 26650 3.7V 4500mAh Rechargeable Protected Li-Ion Batteries (2-Piece) max. 13A continuous discharge current. Price for a pair $24,98 (with BLF $23,73). My link - non aff-link
Not a flashlight, but it produces light: Fire-Maple FML-601 Camping Gas Lamp 80 LUX / 1500W firepower. Price $22,90. My link - non aff-link
Security Tracker LED Pet Collar Pendant Light 3*LR41. Price $2,11 My link - non aff-link