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09-27-2009, 06:42 AM   #1
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AF-540FGZ Flash Batteries

I am currently using Power2000 2900mAh HiMH and the charger that came with them and I am really not sure if its a good setup. I believe its all Adorama's branded stuff and its about 2 years old. When I use my flash with TTL in my house or small room its not bad, but if I am in a church or larger room its brutally slow and kills batteries very fast. I know it would be slower but not this bad. Anyone have any recomendations for batteries?

Any advice is greatly appreciated. Thanks in advance.

09-27-2009, 07:10 AM   #2
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A 2-year old NiMH battery, even if unused may have lost a substantial amount of its charge holding capacity. I had a set which was only lightly used, but after 2 years of cycling it was basically junk.
If you can get your hands on a battery tester (there are good and cheap ones available) its easy to confirm how much charge your battery is actually accepting "fully charged". My 2-year old Energizer recyclables were taking only 30-40% when "fully chaged"

Eneloops and MahaPowerex rechargeables work very well, and keep their charge for months. I get hundreds of AF540 flash shots on one charge.

Bounce flash in large rooms and high-ceilinged buildings like churches use a lot of power, of course. It takes longer to recycle the flash, and you get much fewer shots per re-charge on the battery.
Keep another set of 4 fully recharged batteries always in your camera bag, and you'll never worry of running out of juice halfway through an event.
09-27-2009, 07:56 AM   #3
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an extra set? i went through 4 sets in a 1 hour christening and i really didnt shoot that much. Ok now i need to shop for some batteries.
09-28-2009, 06:54 PM   #4
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Anyone have any experience with the Sanyo Enelope batteries?

09-28-2009, 07:11 PM   #5
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You shouldn't be going through 4 sets of AAs in an hour unless you're discharging them non-stop. You may just need a good set of AAs like the Eneloops you suggested to yourself!
They're one of the best rated AAs, along with Maha's Powerex 2700mAh AAs, for high discharge devices like flashes.
09-28-2009, 07:12 PM   #6
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That's all I use in my K200D. I also use them in my old AF200S. They work quite well in both and last a long time. I probably get 1400 to 1500 shots using my battery grip. Never really checked how long they last in the flash. I don't take that many flash pictures. You won't be disappointed.
09-28-2009, 08:13 PM   #7
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QuoteOriginally posted by pcfranchina Quote
I am currently using Power2000 2900mAh HiMH and the charger that came with them and I am really not sure if its a good setup.
1. I don't think there any genuine 2900mAh AAs available. Also the high-capacity ones (2700mAh) have a high self-discharge rate.

2. Unless it's a smart charger, the charger if very quick may have stuffed up the batteries through overcharging. How long does it take to charge a set?

I use Sony Eneloops & a La Crosse BC-900 and charge at the 700mA rate (0.3C) so it takes about 4 hrs. I could charge faster, but I want the batteries to last.

09-29-2009, 09:46 AM   #8
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QuoteOriginally posted by pcfranchina Quote
Anyone have any experience with the Sanyo Enelope batteries?
They worked great in my 540FGZ, and now power my 580EXII and 430EXII. I highly recommend eneloops

09-30-2009, 01:21 PM   #9
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Eneloops are well worth the price. I have 8 of them and I only went through 1 1/2 sets of 4 when I was in Florida for 5 days. And it was not sunny...
10-02-2009, 11:44 AM   #10
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Every now and again you can find the external battery pack for the 540 on eBay. It attaches to the flash and draws on 6 C cell batteries. Supposedly, the recycle time is extremely quick and they last forever.
10-04-2009, 06:31 PM   #11
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I've noticed that the age of rechargeables seems to be very important. I've got many different brands/mah sizes/ages. When I got my new K2000, the only rechargeable set that worked was a new set of Kodaks that I purchased on vacation when I ran out on my old camera. I have an number of sets with higher mah ratings than the kodaks but none worked even though they work fine with my old camera. I purchased a couple of sets of 2700's and they work fine. I think these batteries lose some of their punch after a period of time or so. just mho...

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