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11/18/2015 03:18:00 PM · #1 |
| I have been using Eneloop Pro and so far I am happy. Initiailly I was using Canon 580EX II and then I bought Yongnuo flash YN600ex-rt and Flash is impressive though I have been noticing that after running for say 150 flashes, flash cycle goes down. I have to take it out from the shoe, turn is off, put back on the shoe and restart it and it goes back to normal. After running for say another 50 or so then batteries go off. is this normal behaviour of battery and recycle of flash? I got battery sometime in late 2014 and Flash I got in June 2015. |
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11/18/2015 03:44:09 PM · #2 |
| Are you using HSS or a high power? the speedlight may have circuitry that is limiting the recycle time to keep it from over heating. |
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11/18/2015 03:59:06 PM · #3 |
Originally posted by Mike:
Are you using HSS or a high power? the speedlight may have circuitry that is limiting the recycle time to keep it from over heating. |
HSS but when it start slowing down including the output light then I change to high power to boost the output power |
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11/19/2015 02:16:01 PM · #4 |
Originally posted by pgirish007:
HSS but when it start slowing down including the output light then I change to high power to boost the output power |
All AA batteries will slow their discharge rate as their power is used up. Different batteries will suffer more or less than others, but the Eneloops are known to perform pretty well. As a battery gets closer to having no power left, the recycle time will drastically spike. The improvement in flash recycle you note is a bit strange, and could be more related to the fact that you give the batteries time to cool down/recover and less due to the fact that you're removing them. Some batteries also have built in thermal cutouts, not sure if the Eneloops are one that does, but that also drastically can slow recycle regardless of remaining power. Mike is also right about the flash itself possibly being your bottleneck, but it's somewhat unclear at this point which it is.
ETA: Your specific usages are also very hard on batteries. HSS uses a huge amount of battery power because it causes the flash to literally strobe multiple times, and then switching to high power short discharges is pretty much the hardest you can make a set of batteries work.
Message edited by author 2015-11-19 14:18:20. |
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11/19/2015 03:20:53 PM · #5 |
Originally posted by spiritualspatula:
Originally posted by pgirish007:
HSS but when it start slowing down including the output light then I change to high power to boost the output power |
All AA batteries will slow their discharge rate as their power is used up. Different batteries will suffer more or less than others, but the Eneloops are known to perform pretty well. As a battery gets closer to having no power left, the recycle time will drastically spike. The improvement in flash recycle you note is a bit strange, and could be more related to the fact that you give the batteries time to cool down/recover and less due to the fact that you're removing them. Some batteries also have built in thermal cutouts, not sure if the Eneloops are one that does, but that also drastically can slow recycle regardless of remaining power. Mike is also right about the flash itself possibly being your bottleneck, but it's somewhat unclear at this point which it is.
ETA: Your specific usages are also very hard on batteries. HSS uses a huge amount of battery power because it causes the flash to literally strobe multiple times, and then switching to high power short discharges is pretty much the hardest you can make a set of batteries work. |
yes I am getting it now what could be happening. Then raises another question that how many of you guys do when you cover an event where you will need to use flash for say 3-4 hours? do you switch flashes every say 1 hour?
Message edited by author 2015-11-19 15:21:23. |
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11/20/2015 01:47:58 AM · #6 |
Originally posted by pgirish007:
yes I am getting it now what could be happening. Then raises another question that how many of you guys do when you cover an event where you will need to use flash for say 3-4 hours? do you switch flashes every say 1 hour? |
Most people use multiple sets of batteries. I don't do event photography, but I do have somewhere between 24 and 32 (honestly don't remember and haven't amassed them all recently) AA rechargeable batteries for speedlight work. I like the ThinkTank battery holders, as they are lightweight, durable, simple, and easily allow you to orient batteries to determine if they are used or not. Beyond that, your other option is to use an external battery pack like the CP-E4 (for the Canon 580 EX II and others) which basically expands the number of batteries that your flash holds and allows for quick swapping. This will do two things- increase the available power storage, as well as decrease your recycle times across the board. Unfortunately, it's not all rainbows, as this will also cause more strain on your flash, as you will be more prone to building up heat faster due to the decreased recycle time. As to the Yongnuo behaving strangely as a whole, it's difficult to say if it is due to the somewhat poor quality control of the Yongnuo or if your batteries are your issue.
I will say that 150 high power flashes is pushing you pretty far into the decreased performance area of most batteries, which is the point at which I instantly swap them out. Note that they still have charge, but the performance hit is substantial enough that it just makes more sense to swap to another set instead of squeezing that last bit out (carrying extra batteries is easier than waiting an eternity for the flash to cycle).
Message edited by author 2015-11-20 01:49:14. |
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