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eneloop XX 2500mAh Typical / 2400 mAh Minimum, High Capacity, 4 Pack AA Ni-MH Pre-Charged Rechargeable Batteries

by Sanyo
| 8 answered questions

List Price: $24.99
Price: $16.80 & FREE Shipping on orders over $35. Details
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XX 4 Pack AA
  • Pre-charged and ready for immediate use
  • Can be recharged up to 500 times
  • Batteries maintain 75% of charge after 1 year of non-use
  • Provide high performance in sub-zero temperatures to -4 degrees Farenheit
  • No memory effect; a full charge every time,Nominal Voltage: 1.2 V

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Frequently Bought Together

eneloop XX 2500mAh Typical / 2400 mAh Minimum, High Capacity, 4 Pack AA Ni-MH Pre-Charged Rechargeable Batteries + La Crosse Technology BC-700 Alpha Power Battery Charger
Price for both: $49.51

Buy the selected items together


Technical Details

Size: XX 4 Pack AA
  • Brand Name: Sanyo
  • Model: HR-3UWXA4A
  • Battery Type: NiMh
  • Item Package Quantity: 1

Product Details

Size: XX 4 Pack AA
  • Product Dimensions: 4.5 x 3.7 x 0.6 inches ; 4.6 ounces
  • Shipping Weight: 1 pounds (View shipping rates and policies)
  • Shipping: This item is also available for shipping to select countries outside the U.S.
  • ASIN: B0058GZWXQ
  • Item model number: HR-3UWXA4A
  • Average Customer Review: 4.6 out of 5 stars  See all reviews (5,495 customer reviews)
  • Amazon Best Sellers Rank:
  • Date first available at Amazon.com: June 24, 2011

Product Description

Size: XX 4 Pack AA

From the Manufacturer

The 4HR-3UWX 4-AA rechargeable battery pack utilizes SANYO's new, Double X (XX) battery Powered by eneloop which provides 2500mAh of performance for long lasting, high power capacity, extreme applications. XX batteries are the perfect choice for powering high current consuming devices such as photo strobe flash lights; providing more than twice the number of flashes per recharge in less than half the time as compared to conventional alkaline batteries!

Product Description

The 4HR-3UWX 4-AA rechargeable battery pack utilizes SANYO's new, Double X (XX) battery Powered by eneloop which provides 2500mAh of performance for long lasting, high power capacity, extreme applications. XX batteries are the perfect choice for powering high current consuming devices such as photo strobe flash lights; providing more than twice the number of flashes per recharge in less than half the time as compared to conventional alkaline batteries!

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Customer Questions & Answers

Customer Reviews

4.6 out of 5 stars
5 star
4,298
4 star
652
3 star
191
2 star
137
1 star
217
See all 5,495 customer reviews
So far these batteries have worked great & the pricing was good.
J. Markussen
Definitely saving me lots of money in the long run, rather than buying batteries all the time.
shaeff
They hold their charge a long time, and they last longer than other rechargeables.
M. Ledyard

Most Helpful Customer Reviews

2,867 of 2,918 people found the following review helpful By NLee the Engineer HALL OF FAMETOP 10 REVIEWER on April 20, 2011
Size Name: 8 Pack AA
I have done extensive testing on the original eneloop rechargeable batteries since early 2007, shortly after they were introduced in the US. I have also tested the blue second-generation eneloop cells from the Costco eneloop package back in 2010. But this is the first time I have seen second-gen eneloop in white wrappings being sold in the US. With so much talk about counterfeit eneloop going around, I was understandably cautious when I purchased those SANYO NEW 1500 eneloop 8 Pack AA Ni-MH Pre-Charged Rechargeable Batteries.

I tested four of those cells, using my old La Crosse BC-900 Battery Charger.
- Right out of the package, their average remaining charge is 1568mAh, or nearly 80% of the rated capacity of 2000mAh. The spread is also very small, from 1558 to 1577mAh. This proves that they are indeed low-self-discharge type. (Date code on my cells says "11-01", or Jan 2011)
- After one recharge/discharge cycle, their average capacity improved to 2115mAh
- After two more recharge/discharge cycles, their average capacity leveled off at 2133mAh, or more than 6% higher than the rated capacity.

The above results are very consistent with what I have previously observed, while testing second-gen eneloop cells in the Costco package.
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742 of 767 people found the following review helpful By NLee the Engineer HALL OF FAMETOP 10 REVIEWER on May 8, 2012
Size Name: 4 pack AA
I have been using Sanyo eneloop low-self-discharge NiMH batteries since beginning of 2007, and I'm completely satisfied with them. One thing I noticed is that newcomers to the rechargeable battery arena often have similar questions/confusions about eneloop. So here is my list of eneloop Frequently Asked Questions. This list is work in progress.

[Q1] My Sanyo eneloop AA batteries say '1900mAh' on them. Are they counterfeits?
[A] All eneloop AA cells (both original and second-gen versions) are rated for "Typ 2000mAh, Min 1900mAh" according to Sanyo. The confusing part is that 2nd-gen eneloop AA cell only has "Min 1900mAh" printed on it, even though the actual measured capacity is close to 2100mAh.
Simialrily, eneloop AAA cells are rated for "Typ 800mAh, Min 750mAh".

[Q2] Date code on my new eneloop cells says '10 01' (Jan 2010). Should I exchange them for newer batteries?
[A] Relax! Unlike ordinary NiMH cells, Sanyo eneloop are still perfectly good even after 5 years in storage. Once you recharge them, they will return to 100% capacity again.

[Q3] What is the difference between 'Pre-Charged', 'Hybrid', 'Stay-Charged', 'Active Charged', 'Ready to Use' and 'Ready to Go'?
[A] Those are all marketing terms for Low-Self-Discharge (LSD) NiMH batteries. Sanyo first used the term 'Pre-Charged' for Sanyo eneloop back in 2006. Rayovac used 'Hybrid', and so on.

[Q4] I just received some new eneloop batteries. Do I need to recharge them before use?
[A] You can use them right out of the package. However, eneloop cells are only charge up to ~75% when they left factory. So you can use a Smart charger to 'top-off' their charges. Do NOT do this with a Dumb charger because it will badly over-charge them.
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480 of 512 people found the following review helpful By NLee the Engineer HALL OF FAMETOP 10 REVIEWER on April 30, 2011
Size Name: 4 pack AAA
This package (Sanyo SEC-HR4U4BPN) contains four second-generation eneloop AAA rechargeable batteries. I have tested those cells using my old La Crosse BC-900 Advanced Battery Charger. Here are my findings:
- Right out of the package, the average remaining charge is 640mAh, or 80% of the rated capacity (800mAh)
- After the first recharge cycle, the average capacity increased to 839mAh.
- After two more recharge/discharge cycles, the average capacity leveled off at 843mAh, or 5% higher than rated capacity.

The above is very consistent with the results I obtained last year, while testing 2nd-gen eneloop AAA cells from the Costco package. Therefore I have no doubt that those batteries are genuine. Date code embossed on them says "10-12", which means Dec 2010 (see my upload in the "Customer Images" section, if you need to know where to find the date code).

According to Sanyo press releases, those 2nd-generation eneloop cells offer several benefits over the original eneloop:
- Can be recharged "up to 1500 cycles" (vs. "1000 cycles" for the original)
- Can hold "75% charge after 3 years" (vs. "80% after 2 years")
- Works down to -20 degree C (vs. -10 degree C)

In real life, however, it is nearly impossible for the average user to experience those benefits.
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