Nitecore t2s cree xp e r2 key ring led torch description the nitecore t2s is an ultra compact led torch powered by a single aaa battery ideal for attaching to a key ring the t2s has three output levels high 50 lumens 1 hour 30 minute runtime medium 20 lumens 3 hour 30 minute runtime low 2 lumens 28 hour runtime the t2s employs a highly efficient current control circuit for stable brightness at all output levels a feature rarely found on this type of light waterproof to 2