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Premium AccuEvolution 9v NiMH Precharged Low Self Discharge Rechargeable Batteries - camera, wireless, all other use

4.8 out of 5 stars 7 customer reviews

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  • Charged and ready for immediate use
  • Very low self discharge rate
  • Keep 80% of charge in a year
  • Replaces standard Alkaline 9V batteries
  • 9 volt/200 mAh

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Technical Details


Product Description

New 9V Low-self discharge battery in the market. The key-advantage of low discharge NiMH Rechargeable batteries compared to usual rechargeable batteries is their extremely low self-discharge. After one year of storage the retain up to 80% of it capacity.

Product Information

Product Dimensions 3.9 x 2.1 x 0.5 inches
Item Weight 1.6 ounces
Shipping Weight 1.6 ounces
ASIN B0006GCY6Q
Item model number AP-E-200-1
Customer Reviews
4.8 out of 5 stars 7 customer reviews

4.8 out of 5 stars
Best Sellers Rank #7,356 in Camera & Photo > Camera & Photo Accessories > Batteries & Chargers > Batteries > Camera Batteries
#151,651 in Health & Personal Care > House Supplies
Date first available at Amazon.com May 5, 2005

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Product Warranty: For warranty information about this product, please click here

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Customer Reviews

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Top Customer Reviews

Verified Purchase
I was not able to use this battery and had to return it. The specifications do not indicate the max charging current, or quickest charge time. When I received the battery, on the side it said 4hour quick charge max at no more than 60mA. This will not work safely in the Maha PowerEx MH-C490F-DCW Worldwide 9-Volt Battery Charger w/ Car Adapter I have (2 hour, 90mA charger). These specifications are pretty important if you don't want to have batteries explode and possibly burn your house down.
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There are only a couple of companies that make 9v Low Self Discharge batteries. I now use AccuEvolutions 9v rechargeables in all of the smoke alarms and precision devices at home and in my profession.

Unlike conventional NiMH rechargeables, the AccuEvolution has an extremely low self discharge rate (less than 2% per month at room temp), so it stays charged for quite a while -- which is absolutely essential for smoke alarms and such. Unlike the lithium and alkaline batteries I was using, the AccuEvolution 9v maintains constant voltage during use and throughout its entire discharge cycle - which solves a lot of problems with sensitive equipment.

I have no idea where Amazon got this old picture of these batteries. The ones I get from Bearwobble have the familiar AccuEvolution logo.
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Verified Purchase
I purchased this battery in an effort to find a good NiMH 9v. The battery is packaged as shown. Amazon delivered the package on time.

I installed this 9 volt battery, without charging it, into my home smoke detector on 7/3/2012. I will update this review when I have more info.

UPDATE: 2/28/13, The battery is still working fine in my smoke detector. I have not yet had to charge it. It appears this NiMH 9v battery, holds a voltage of .1 -.2 volts higher than other batteries of it's kind.

UPDATE: 4/19/13, I charged this 9 volt battery today for the first time and put it back in my smoke detector - that's a service period of more than 9 months right out of the package, after storing it for a month. I am expecting a service period of perhaps a full year, now that it has had it's first full charge cycle.

This AccuEvolution battery is better than the other NiMH 9v batteries. I am very pleased with this purchase. I hope the price comes down over time.
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Verified Purchase
You are not supposed to use a rechargeable battery in a smoke detector because they lose 12% of their power each month and so would be unreliable. But this battery loses just 12% in a year! Now I can just change all four in the house at one time about twice per year. No more "which one is beeping?".

High initial cost but zero cost for the life of this battery. Nice job!

Update 12/20/2011: One of the 4 batteries I bought just went bad. Dropped to 2.45 volts and will not charge. The others are still going strong though.
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