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More 600EX-RT/Battery questions...fun!

nuncle
Contributor

Greetings all!

I've seen several discussions about batteries and the flash, but I'm just trying to get the "definitive" answer 🙂

I've got two 600EX-RT's. The first one died on me at Christmas last year. While shooting, I discovered that the batteries became hot...really hot. The next time I tried to turn on the flash...nothing. Brand new batteries did nothing.

I had some extra money at the time and my flash was almost 2 years old so I bought a new 600 in January. While shooting with it about a month ago, the same thing happened. The batteries got so hot that, after I took them out and put them into my pants pocket I had to take them out because they were burning my leg! Smiley Surprised

That flash was still under warranty, so I sent it in and it's fixed now.

 

I have always used non-rechargable batteries...and I've used the Duracel Ultimate, for the most part...or the Eveready version. Don't remember the name, but I've always bought the "strongest, longest-lasting" type of whichever brand, on the theory that "The stronger the bettery, the longer it'll last".

 

Are rechargeable batteries better for the 600EX-RT? Are they worse? What's the Straight Dope? 🙂

13 REPLIES 13

Hi Bob!

That sounds pretty close to right, actually:)

The recycle time absolutely increases a ton after I've used the flash for a while. Later on in the day (Like during the wedding reception after the toast, during the dancing), it's pretty much guarenteed that I take a shot or two without the flash because it didn't fire when it was supposed to, because it was still recycling.

     Now, that does only seem to happen when I'm using the flash relatively hard. Perhaps taking 5-6 pics a minute, on average. Not for an hour continuesly of course, but imagine taking pics while the wedding couple dances and all the fun that's happening and you get the idea...

     Would rechargable batteries make any difference with this, do you think? Logically, it doesn't seem like it would since they must operate the same way as alkaline..?

     And what about using a battery pack? Something like this:

http://www.amazon.com/Canon-CP-E4-Compact-Battery-Pack/dp/B000NSJ4Q0/ref=sr_1_1?ie=UTF8&qid=14056950...

Does it really make that much of a difference? This is a bit pricey and the newest review for it seems to be 2010, so that doesn't seem like a big seller, you know? 😛

Rechargable batteries cycle noticeably faster than alkalines.    

 

If you were to graph a power-depletion curve for the flash, showing the voltage output as the remaining milliamp capacity drains, you'd notice that an alkaline battery's voltage keeps gradually dropping until it runs out of power.  Rechargeables are different... they tend to consistently put out the same voltage... but just as they get to the end of their supply of power then voltage suddenly drops quickly.

 

When you use an external battery pack, the recycle times are faster in addition to being able to shoot longer before needing to change the batteries.

 

Tim Campbell
5D III, 5D IV, 60Da


@nuncle wrote:

Hi Bob!

That sounds pretty close to right, actually:)

The recycle time absolutely increases a ton after I've used the flash for a while. Later on in the day (Like during the wedding reception after the toast, during the dancing), it's pretty much guarenteed that I take a shot or two without the flash because it didn't fire when it was supposed to, because it was still recycling.

     Now, that does only seem to happen when I'm using the flash relatively hard. Perhaps taking 5-6 pics a minute, on average. Not for an hour continuesly of course, but imagine taking pics while the wedding couple dances and all the fun that's happening and you get the idea...

     Would rechargable batteries make any difference with this, do you think? Logically, it doesn't seem like it would since they must operate the same way as alkaline..?

     And what about using a battery pack? Something like this:

http://www.amazon.com/Canon-CP-E4-Compact-Battery-Pack/dp/B000NSJ4Q0/ref=sr_1_1?ie=UTF8&qid=14056950...

Does it really make that much of a difference? This is a bit pricey and the newest review for it seems to be 2010, so that doesn't seem like a big seller, you know? 😛


I have two of those. I used to use them for all major events, but rarely anymore. The plastic tabs that hold the batteries in place are annoyingly flimsy and tend to break off. And since each one is just eight rechargeable NiMH AAs with some extra circuitry, it doesn't improve your recycle time very much. But any battery pack will at least keep the recycle time from deteriorating as much while the batteries are running down.

What I use for events now is one of the Godox lithium battery packs. (B&H sells them under the "Bolt" brand name.) On the one I have, the battery itself is detachable. So you can have a spare, and with a second charger you can charge both at once. It has two outlets, so you can power two cameras. I love that feature, becausse I almost always use two cameras at events, so that I don't have to change lenses.

 

A battery pack like my Bolt does decrease the recycle time, but that's a two-edged sword. When you fire the flash more often, it heats up faster, even though the battery doesn't. You can reach a point at which either the flash knows enough to stop and cool off or it burns out. Recent Canon speedlites are pretty good about knowing when to stop, but the online literature is replete with horror stories. So the more powerful battery pack you have, the more careful you need to be. Even if the worst doesn't happen, it's damned embarrassing at an inauguration or awards ceremony to have the flash take a 12-minute timeout while there are people on the stage waiting to be photographed. I sometimes try to have a third flash available to guard against that eventuality.

 

Even with a battery pack, you still need four batteries in the flash unit to control its circuitry. For that I always use high-quality rechargeables and wouldn't consider anything else.

Bob
Philadelphia, Pennsylvania USA

Thanks for all your help, everyone! 😄

 

I think that rechargeble batteries are definitely in my future...you get hit over the head enough times and eventually it sinks in.. 🙂

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