Energizer 1251 2 D cell Industrial flashlight. The Energizer 1251 Heavy Duty Flashlight is just 8 long but has a rated lamp output of 11.4 lumens. Two D-cells supply power for its PR-2 bulb. This flashlight is chemical. Grease and impact resistant. A high visibility industrial yellow Polypropylene barrel and shatterproof lens make the 1251 a rugged flashlight. The non-roll barrel design is ribbed to ensure a non-slip grip.