E01 V2.0Description The Fenix E01 V2. 0 is a lightweight and handy torch in the form of a key ring with an efficient light output that is perfect for everyday use, as part of EDC (every day carry) gear, or as a backup flashlight. White Cree XP G2 (S3) is the flashlight's light source. The torch uses a 1x AAA battery. The advantage of such a power supply is its ease of use, lower cost, and subtle flashlight weight. The E01 V2. 0 generates a peak of 100 lumens.