Recycle Time
Make Model Alkaline NiMH Lithium¹ Power Pack
Pentax AF200FG 4 4 4
Pentax AF360FGZ 6 6 6
Pentax AF540FGZ 6 6 6 4.5
Metz 24 AF-1 3 ? ?
Metz 36 AF-5 3 ? ?
Metz 44 AF-1 3-4 3-4 3-4
Metz 50 AF-1 3.5 3.5 3.5
Metz 52 AF-1 4 3.5 4.5
Metz 54 MZ-4i 6 5 ? ?
Metz 58 AF-1 5 5 ? 2.5
Sigma EF-530 DG² 6 4 ?
Sigma EF-610 DG² 7 5 ?
Promaster 5250DX 10 ? ?
Promaster 5550DX 10 ? ?
Promaster 5750DX 10 ? ?
Promaster 7200EDF 10 ? ?
Promaster 7400EDF 10 ? ?
Promaster 7500EDF 10 ? ?
Tumax DSL28AF 10 ? ?
Tumax DPT3AFZ 9 ? ?
Tumax DPT5AFZ 9 ? ?

1 Non-rechargeable AA Lithium cells. Rechargeable lithium batteries are not supported.
2 both Super and ST models.

Keep in mind that these numbers represent the worst case: time to recover from a full discharge. A more powerful flash will need a smaller portion of full charge for a given level of light and will be correspondingly faster in practical use. On the other hand, recharge times will increase as the battery drains.

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