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eneloop XX 950mAh Typical / 900mAh Minimum, High Capacity, 4 Pack AAA Ni-MH Pre-Charged Rechargeable Batteries

4.6 out of 5 stars 7,981 customer reviews
| 432 answered questions

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XX 4 Pack AAA Size Chart
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  • Maintain 85% of charge after 1 year of non-use
  • Can be recharged up to 500 times
  • High performance at temperature as low as -4 degrees F
  • No memory effects allow batteries to recharged when fully or partially drained
  • Stable voltage output with longer power life than conventional alkaline batteries
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Frequently Bought Together

  • eneloop XX 950mAh Typical / 900mAh Minimum, High Capacity, 4 Pack AAA Ni-MH Pre-Charged Rechargeable Batteries
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  • Panasonic BK-3HCCA4BA Eneloop Pro AA High Capacity Ni-MH Pre-Charged Rechargeable Batteries (Pack of 4)
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  • Panasonic BQ-CC17KSBA eneloop Advanced Individual Battery Charger with 4 LED Charge Indicator Lights, Black
Total price: $56.45
Buy the selected items together

Technical Details

Size: XX 4 Pack AAA
  • Brand Name: Sanyo
  • Model Number: HR-4UWXA4A
  • Battery Description: Nickel Metal Hydride
  • Battery Type: NiMh
  • Item Package Quantity: 1

Product Description

Size: XX 4 Pack AAA

The 4HR-4UWX AAA rechargeable batteries utilize eneloop XX technology, delivering 950mAh of long lasting performance for high power applications. XX batteries are the perfect choice for powering high current consuming devices such as cordless phones, LED flashlights, photo strobe flash units, wireless keyboards / mice, game controllers, radio controlled toys and thousands of other battery operated products. Eneloop XX batteries are engineered to excel in extreme conditions where high power performance is needed. These Nickel Metal Hydride batteries retain up to 85% of their capacity even after one full year of storage. Unlike regular alkaline batteries which can only be used once the XX batteries can be recharged up to 500 times. They are pre-charged at the factory using solar power and can be used immediately out of the package. eneloop XX batteries deliver reliable, high power battery performance when, and where, you need it most!

Product Information

Size:XX 4 Pack AAA
Product Dimensions 4.5 x 3.8 x 0.6 inches
Item Weight 1.6 ounces
Shipping Weight 1.6 ounces (View shipping rates and policies)
ASIN B009LU9128
Item model number HR-4UWXA4A
Customer Reviews
4.6 out of 5 stars 7,981 customer reviews

4.6 out of 5 stars
Best Sellers Rank #247 in Electronics > Accessories & Supplies > Batteries, Chargers & Accessories > Household Batteries > AAA
Date first available at Amazon.com October 3, 2012

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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

By NLee the Engineer HALL OF FAMETOP 10 REVIEWER on April 20, 2011
Size: 8 Pack AA Verified Purchase
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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Size: 4 Pack AA Verified Purchase
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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Size: 4 Pack AAA Verified Purchase
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.
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