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Quantum ES2 Dummy Battery - Energy Saver 2 f/ Canon 430EZ, 540EZ, 550EX; Nikon SB24, SB25

3.5 out of 5 stars 3 customer reviews

Currently unavailable.
We don't know when or if this item will be back in stock.
Currently unavailable. We don't know when or if this item will be back in stock.

Product Description

The Energy Saver 2 is the size and shape of an AA battery. It substitutes for one of the alkaline batteries in the flash battery comparent. Always start with a fresh set of AA batteries. The result will be much longer lasting AA's. The Energy Saver is for : Canon 430EZ, 540EZ, 550EX; Nikon SB24, SB25

Product Information

Product Dimensions 5.7 x 3 x 0.5 inches
Item Weight 0.8 ounces
Shipping Weight 0.8 ounces
ASIN B0000C5RR8
Item model number QUANES2
Customer Reviews
3.5 out of 5 stars 3 customer reviews

3.5 out of 5 stars
Best Sellers Rank #1,686 in Electronics > Accessories & Supplies > Batteries, Chargers & Accessories > Household Batteries > AA
Date first available at Amazon.com June 17, 2003

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Top Customer Reviews

I bet a lot of people don't know what this is for, and neither did I for a long time, so I thought I'd write a review explaining it's purpose.

When you use a speedlight on your camera with an small external battery pack, the flash still requires batteries inside the flash to fire. You can't just take the batteries out of the flash and rely only on the external pack. What the flash does is partially drain it's own batteries first and then suck juice from the external pack as a secondary source. This doesn't always give good recycle times if your AA's are getting weaker.

What this does is trick the flash into thinking there is a battery inside the flash, so it will fire, but it will suck power straight from the external pack, giving you much faster recycle times. You would only use one dummy battery and three real alkaline/NiMH batteries. The in-flash batteries will still be drained of power unfortunately, but that power just isn't being used as the primary source for recharging the flash.

Or something like that.
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I needed to solder an external power supply to replace AA batteries and these did the trick. If you need long life for your AA powered device this product will help you accomplish the task.
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did not extend battery life as I expected. I should have realized one can't expect a dummy anything to work well.
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