The Pentax TR Power Pack III is an external power Source for the Pentax AF-540 FGZ flash. It uses six "C" cell batteries, and will significantly increase the capacity and decrease the recycling time of the flashgun.
Power Source: 6 "C" batteries (NiCD not compatible)
Recycling Time 4.5 Seconds (at full power)
Dimensions 3.7 x 7.5 x 1.6" (95 x 190 x 40mm)
Weight 12 oz (340 g) (without batteries) 1.6 lb (740 g) (with batteries)
Expand the battery life of the AF540FGZ flash by up to 700 shots.
Dimensions: 95 (W) x 190 (H) x 40 (D) mm - 3.7 (W) x 7.5 (H) x 1.6 (D) in
Notes: AA batteries are required in the Pentax AF540FGZ flash, even if the TR Power Pack 3 is in use. The flashgun will not operate without AA batteries loaded.
Pentax TR Power Pack II
Pentax case and strap for comfortable.
For more information about, Pentax TR Power Pack III for Pentax AF-540FGZ Flashgun .