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Yuasa Enitime PLUS AA 2500mAh Low Self Discharge LSD Rechargeable Batteries 4-Pack HIGHEST Capacity among Pre-Chargeable Batteries

by Yuasa

List Price: $22.00
Price: $17.99 & FREE Shipping on orders over $35. Details
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Only 17 left in stock.
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  • 4-pack of Yuasa Enitime PLUS 2500mAh (2300mAh minimum) Ni-MH rechargeable AA batteries
  • Highest capacity in the line of pre-chargeable batteries
  • Pre-chargeable and retains 80% capacity when fully charged
  • Unlike regular Ni-MH batteries, Enitime batteries have low self-discharge rate
  • Once fully charged, Enitime batteries will retain 80% capacity after 1 year
2 new from $15.95

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Frequently Bought Together

Yuasa Enitime PLUS AA 2500mAh Low Self Discharge LSD Rechargeable Batteries 4-Pack HIGHEST Capacity among Pre-Chargeable Batteries + Hitech iC-808UL-LCD 8 Bank Smart Quick Charger/ Discharger with LCD Display for AA, AAA Batteries
Price for both: $55.98

Buy the selected items together


Special Offers and Product Promotions

  • Save 10% on this item when you purchase 1 or more Hitech iC-108UL / IC-808UL-LCD Smart Charger for AA / AAA Rechargeable Batteries offered by Hitech. Enter code 3NSIX4FX at checkout. Here's how (restrictions apply)

Technical Details

  • Brand Name: Yuasa
  • Model: AACX2500
  • Item Package Quantity: 1

Product Details

  • Product Dimensions: 4.3 x 3.8 x 0.8 inches
  • Shipping Weight: 8 ounces (View shipping rates and policies)
  • ASIN: B0036UMAHM
  • Item model number: AACX2500
  • Average Customer Review: 3.8 out of 5 stars  See all reviews (6 customer reviews)
  • Date first available at Amazon.com: February 5, 2010

Product Description


*** Cells are not precharged 100% due to safety concerns and regulation from transportation authorities. Please fully charge the batteries before your first use or before storing them.

Yuasa Enitime batteries are pre-chargeble. The "ready to use technology" is designed in Japan. Unlike regular rechargeable batteries, Enitime batteries have low-self discharge rate. Once fully charged, Enitime will retain 80% capacity after 1 year and ready to use at any time. Yuasa Enitime AA batteries provide superb amounts of clean, fresh energy to any device that uses AA batteries. Rechargeables save the environment because there is no need to throw them out when they are depleted. Ni-MH batteries such as these can be recharged fully or partially up to 1000 times without experiencing "memory effect". Excellent for high drain devices such as digital cameras, game consoles, toys, audio cd players, etc.

GS Yuasa Corporation has long been a leading manufacturer of motorsports batteries, and also makes premium, high-quality consumer rechargeable batteries. GS Yuasa was formed in 2004 by a merger between Yuasa Battery and Japan Storage Battery, to form one of the largest and most reliable manufacturers of all types of rechargeable batteries.

Recommended to use with Hitech iC-108UL Smart Quick Charger (charger not included).  

Yuasa AA rechargeable batteries are also available in 2700mAh and 2100mAh capacity rating. Please visit our Storefront to view a complete line of Yuasa Ni-Mh AA and AAA batteries.


Customer Questions & Answers

Customer Reviews

3.8 out of 5 stars
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Most Helpful Customer Reviews

I was excited when I heard about those Yuasa EniTime PLUS AA 2500mAh Pre-Charged Rechargeable Batteries, because they are supposed to offer the highest capacity among pre-charged AA cells (note that SANYO has announced the 'eneloop XX' 2500mAh AA cells last year, but those are not yet available outside of Japan). Yuasa is a major manufacturer in rechargeable batteries. Previously I have had good experiences with Rayovac Rechargeable Hybrid NiMH Batteries which are actually made by Yuasa, so I fully expect those EniTime Plus cells to deliver as promised.

First warning sign: right out of the package, the terminal voltages of those EniTime PLUS cells were all slightly below 1.20V, which means they are nearly exhausted. When I tested them using my old La Crosse BC-900 charger/analyzer, the average remaining charge was just 12mAh! That means the claim of "Pre-charged and ready to use immediately" is completely false. It also makes me wonder whether those are really low-self-discharge type as advertised.

Subsequent testing result, however, was more promising. After the first recharge/discharge cycle, the average capacity improved to 2402mAh. This capacity remained the same in following cycles. This seems to suggest that they are indeed LSD cells, because ordinary NiMH cells typically take 3-4 cycles to slowly approach their maximum capacities.
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I purchased a pack of those Yuasa - EniTime 2500mAh AA NiMH Rechargeable Batteries more than one year ago, because they claim to be low-self-discharge type, and offer 25% higher capacity compared to the Sanyo eneloop (rated 2000mAh for AA). My actual test results, however, were disappointing.

- Right out of the package, all four cells were exhausted. The average remaining capacity, as measured by my La Crosse BC-900, was only 12mAh! That means the claim of "PreCharged and Ready to Use" is completely false.

- After two Charge/Discharge cycles, the average capacity reached 2400mAh, which is 4% lower than the advertised capacity. In contrast, the Sanyo XX Batteries are also advertised as '2500mAh', but my measured results showed that their average capacity is at 2600mAh.

- After sitting on the shelf for 3 months, a pair of those EniTime cells retained 79% of their original charges. This already invalidated the manufacturer's claim of ">80% after one year" printed on the package.

Recently, I re-measured the remaining charges after 11 and 14 months of storage. One pair retained 64% charge after 11 months, which is below advertised performance but still not too bad. The problem is with another pair after 14 months.
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Verified Purchase
These Batteries worked fine with my Logitech harmony 700. The 2500mAh Batteries make my remote last even longer. I would defiantly recommend this to others.
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