Wednesday, May 18th 2011
After having received my Canon Speedlite 580EX II I decided to go through all my flash batteries to see which are actually any good. I found five sets of four rechargable Ni-MH AA batteries in my
extra camera stuff drawer.
My little investigation gave some pretty interesting results.
I charged the batteries one set at a time and put them first in my old 420EX flash. I let the flash charge up and then pressed the pilot button, measuring the amount of time for the flash to fully charge again. I then did the same test in the new 580EX II (set to manual mode and full power).
The recycle times are shown in the table below.
|GP 1800mAh||11.4 sec||9.2 sec||19%|
|GP 1800mAh||10.0 sec||7.8 sec||22%|
|Xpower 2200mAh||6.8 sec||4.4 sec||35%|
|Hähnel Synergy 2500 mAh||4.3||2.7||37%|
This leads to two interesting conclusions.
The speed of the 580EX II is even more impressive if you consider that it charges with ~80% more power than the 420EX.
It is ironic that the Panasonic batteries turned out to be the fastest. I found them in a box of old left-over batteries at the shop I used to work in, at least five–six years ago.
Edit: I have now ordered, received and tested the Hähnel Synergy 2500 mAh in my flashes. I have added the results to the table.