Yuasa Enitime AAA Pre-Charged Rechargeable Batteries (4-Pack)

by Yuasa

Product Details

• Product Dimensions: 4.3 x 3.8 x 0.5 inches ; 2.1 ounces
• Shipping Weight: 8 ounces (View shipping rates and policies)
• ASIN: B002PJY5O6
• Average Customer Review: 3.5 out of 5 stars  See all reviews (11 customer reviews)
• Date first available at Amazon.com: September 17, 2009

Product Description

Yuasa Enitime batteries are pre-charged and ready to use at any time. 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 AAA batteries provide superb amounts of clean, fresh energy to any device that uses AAA 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).  

Please visit our Storefront to view a complete line of Yuasa Ni-Mh AA and AAA batteries.

Customer Reviews

Most Helpful Customer Reviews

13 of 15 people found the following review helpful:

3.0 out of 5 stars Performs OK, November 9, 2009

By 

Nuknuk (Springfield, VA United States) - See all my reviews
(TOP 100 REVIEWER)   

This review is from: Yuasa Enitime AAA Pre-Charged Rechargeable Batteries (4-Pack) (Electronics)

Review is for the Enitime AA:

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GS Yuasa is a Japanese company that makes batteries mostly for sport vehicles.

My Enitime AAs came pre-charged with my new universal remote control. "Technology from Japan - Made in China". So far, performance is comparable with my other low discharge batteries.

Regular NiMh batteries are old school; these new batteries are greener and better.

Pros:
-For a rechargeable battery, these batteries does not need to be charged before you use it for the first time; right from the packaging into your gadgets.
-They last a long time.
-Does not need special charger. You can use your existing NiMh charger.

Cons:
-After having them for sometime, comparing it with other brands (Eneloops, Duracell), this set charges less juice.
-This later technology is still expensive.

Other brands of low-discharged batteries are Eneloops by Sanyo, Duracell, Hybrid by Rayovac, etc.

3 of 3 people found the following review helpful:

4.0 out of 5 stars Reasonable alternative to Sanyo eneloop - but not quite as good, July 31, 2011

By 

NLee the Engineer (Nashua, NH) - See all my reviews
(HALL OF FAME REVIEWER)    (TOP 10 REVIEWER)   

This review is from: Yuasa Enitime AAA Pre-Charged Rechargeable Batteries (4-Pack) (Electronics)

Those Enitime AAA Pre-Charged Rechargeable Batteries are made by Yuasa, which allegedly also makes the Rayovac Hybrid. Both are supposed to be low-self-discharge type similar to the original Sanyo Eneloop AAA (circa 2007).

My examination on the exteriors of Rayovac Hybrid and Yuasa EniTime showed that they are identical mechanically. Electrically, however, there are some minor differences - presumably due to change in manufacturing process over the years.
- The older Rayovac Hybrid AAA is advertised to have a capacity of 800mAh, and able to retain 80% charge after 6 months.
- The newer Yuasa EniTime AAA is advertised to have a capacity of 800mAh (on each cell it says "min.750mAh"), and able to retain ">80% after one year".

My actual testing showed that the advertised capacity rating of EniTime is accurate. After the initial recharge, all 4 cells reached capacity exceeding 800mAh, with the average at 811mAh. This capacity number is right between that of Rayovac Hybrid (~785mAh) and Sanyo eneloop (~830mAh). The self-discharge rate, however, did not fare as well:
- After 4 months of storage, the average remaining capacity is 79%
- After 7 months of storage, the average remaining capacity is 75.6%

So my measured charge retention rate is obviously worse than advertised. But in real life, most people will never notice the difference between EniTime and eneloop (which claims "80% after 2 years"). As of this writing, the EniTime AAA is priced about 20% less than eneloop. So that makes it a reasonable alternative in non-critical applications such as children's toys - especially if you have half a dozen Zhu Zhu Pets in the house.

2 of 2 people found the following review helpful:

1.0 out of 5 stars Possible Quality issue, September 21, 2010

By 

KpaxHo "Kpax VA" (Arlington, VA USA) - See all my reviews

Amazon Verified Purchase

This review is from: Yuasa Enitime AAA Pre-Charged Rechargeable Batteries (4-Pack) (Electronics)

I bought 2 pack of this item at beginning of 2010, now at Sep, one of the battery is detected dead(not chargable) by my La Crosse charger(BC-9009). The battery is used in a LED light device, this is the first time(I think) it got recharged. I owned the similar Sanyo enloop no problem at all for two years.