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Powerex MHRAAI4 Imedion AA 2400mAh 4-Pack Rechargeable Batteries

by Powerex
4.5 out of 5 stars 219 customer reviews
| 5 answered questions

List Price: $16.95
Price: $12.63 & FREE Shipping on orders over $35. Details
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4-pack Size Chart
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  • Nickel-Metal Hydride (NiMH) Chemistry
  • Voltage of 1.2V and a capacity of 2400mAh
  • Capable of being stored for an extended period of time and still retaining a full or nearly full charge. After a year, for instance, they will retain 85% of their capacity
  • Come pre-charged and can be recharged up to 1000 times
  • A battery carrying case is included
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$12.63 & FREE Shipping on orders over $35. Details In Stock. Sold by MYBATTERYSUPPLIER and Fulfilled by Amazon. Gift-wrap available.

Frequently Bought Together

  • Powerex MHRAAI4 Imedion AA 2400mAh 4-Pack Rechargeable Batteries
  • +
  • Powerex MHRAAAI4 Imedion AAA 950mAh 4-Pack Rechargeable Batteries
  • +
  • Powerex MH-C800S 8-Cell Smart Charger for AA / AAA NiMH / NiCD
Total price: $68.10
Buy the selected items together


Technical Details

Size: 4-pack
  • Brand Name: Powerex
  • Model Number: MHRAAI4
  • Battery Type: NiMh
  • Item Package Quantity: 1

Product Description

Size: 4-pack

The Powerex IMEDION "Ready When You Are!" Rechargeable AA NiMH Batteries (1.2V, 2400mAh) - 4-Pack is a package of 4 AA nickel-metal hydride (NiMH) batteries. They have a voltage of 1.2V and a capacity of 2400mAh. The batteries are capable of being stored for an extended period of time and still retaining a full or nearly full charge. After a year, for instance, they will retain 85% of their capacity. The batteries come pre-charged and can be recharged up to 1000 times. The purchase of NiMH batteries like these saves you money, since you won't need to buy endless supplies of non-rechargeable alkaline batteries. A battery carrying case is included.

Product Details

Size: 4-pack
  • Product Dimensions: 3.5 x 0.8 x 5 inches ; 4.8 ounces
  • Shipping Weight: 5 ounces (View shipping rates and policies)
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B003LWMZ5M
  • Item model number: MHRAAI4
  • Average Customer Review: 4.5 out of 5 stars  See all reviews (219 customer reviews)
  • Amazon Best Sellers Rank:
  • Date first available at Amazon.com: October 2, 2001

Customer Reviews

Top Customer Reviews

Size: 4-pack Verified Purchase
Ordinary 'high-capacity' NiMH cells typically advertise charge capacity of 2500-2700mAh (for AA), but they all suffer from rapid self discharge problems. That is why I switched over to low-self-discharge (also called 'Pre-Charged') rechargeable batteries more than four years ago, starting from the original SANYO eneloop. Over the years I have tested many other name-brand LSD cells such as Rayovac Hybrid and Kodak Pre-Charged, all with great results.

The only drawback of LSD cells is lower capacity. First-generation LSD cells are typically rated at 2000-2100mAh. Recently, I have seen arrival of second-generation LSD cells with higher capacity, such as these IMEDION AA 2400 mAh low self-discharge batteries. Here are my test results, using the La Crosse BC-900 battery Charger/Analyzer:

- Right out the package, the average remaining charge is 1880mAh for a set of four Imedion AA cells. This is about 78% of the rated capacity, which suggests those are indeed low-self-discharge type (ordinary NiMH cells typically arrive exhausted)

- After just one Charge/Discharge cycle, the average capacity improved to 2455mAh, or 2% higher than rated capacity.
Read more ›
37 Comments 165 of 168 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Size: 4-pack
The charging and quality aspects have been covered in great detail and I have nothing to add there. Just be aware that these cells have a slightly shorter + terminal than is usual so there will be a few electronics where they will not work. I have a new Ebook reader and 2 radios where they are a no go so be advised. Some battery compartments can be bent a little to accommodate this problem, others cannot.
2 Comments 28 of 28 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Size: 4-pack
As I googled the Internet and Forums, I found mixed result, some people claims Eneloop performs better, and some claims otherwise. Therefore I decided to do an experiment on both of these batteries to find out which one is a BETTER PERFORMER and better for investment.

Objective: To find out the better performer battery

Items:
1. Four pieces of Sanyo Eneloop AA 2000mAh NiMH Battery
2. Four pieces of PowerEx Imedion AA 2100mAh NiMH Battery
3. Nikon Speedlight SB-800
4. Remote Flash Trigger
5. Process recording device (Sony DSC-P10)

Methodology:
1. Fully Charge the battery
2. Insert battery into Nikon Speedlight SB800
3. Nikon Speedlight SB-800 set to M 1/4 -oEV
4. Fire the Speedlight as soon as it is ready (when the red light is on)
5. Repeat step #3 until the battery is completely depleted
6. Record the following:
a. X number of shots per minute after X number of shots
b. Total shots per charge
7. Repeat the process with next set of battery

To ensure both battery both are in identical optimal condition, I bought both new set of Eneloop and Imedion. Both sets are new and fully charged for 8 hours as recommended by manufacturer for initial use with the same PowerEx MH-C204W Travel Charger before begin the test.

Please refer to the graph my site.

I started off with Eneloop with a recorded blazing fast 60 round per minute (rpm). It drops to 53rpm after the first 100 shots, and then it drops further to 52rpm after 200 shots. It stabilized at average of 45rpm from 300 shots to 1300 shots. It drops to 39rpm at 1400 shots and drops further to 37rpm after 1500 shots. Finally it drops sharply but still managed to squeeze a total recorded 1564 shots.
Read more ›
20 Comments 173 of 200 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Size: 4-pack Verified Purchase
Ordinary 'high-capacity' NiMH cells typically advertise charge capacity of 2500-2700mAh (for AA), but they all suffer from rapid self discharge problems. That is why I switched over to low-self-discharge (also called 'Pre-Charged') rechargeable batteries more than six years ago, starting from the original SANYO eneloop. Over the years I have tested many other name-brand LSD cells such as Rayovac Hybrid and Kodak Pre-Charged, all with great results.

The only drawback of LSD cells is lower capacity. First-generation LSD cells are typically rated at 2000-2100mAh. But by now, we have seen arrival of second-generation LSD cells with higher capacity, such as this PowerEx Imedion Precharged 2400mAh AA Rechargeable Battery. Here are my test results, using the La Crosse BC-900 battery Charger/Analyzer:

- Right out the package, the average remaining charge is 1880mAh for a set of four Imedion AA cells. This is about 78% of the rated capacity, which suggests those are low-self-discharge type (ordinary NiMH cells typically arrive exhausted)

- After just one Charge/Discharge cycle, the average capacity improved to 2455mAh, or 2% higher than rated capacity. This number remains the same in subsequence cycles.
Read more ›
2 Comments 14 of 14 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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