I too have a PD35 and that thing awesome. dropped it so many time and still ticking. Definitely will be used as an AR light when I got AR. If you have the Fenix charger you can pull out the battery, stick it into the charger, plug your cellphone charger cord in, and it will charge your cellphone 2.5 times over with a single 3500mah battery.
Also, their HL60R headlamp is also great to have and the battery are interchangeable with the PD35. Both are a must have for my camping and travelling.