Customer Reviews

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

5 star:		(3)
4 star:		(2)
3 star:		(4)
2 star:		(1)
1 star:		(1)

 

 

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.

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.

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.

I purchased these hoping to save a little over the cost of Eneloop's. While a good performing rechargeable I get better performance and life from the Eneloop brand. Next time I will probably purchase Eneloop for the price difference.

I received this item as chrismas gift. Because my led flash light uses 3 AAA batteries, I constantly restock Alkaline AAAs. Yuasa low discharge AAA are perfect replacement for my application. I plan to buy additional pack to keep them on rotation so I will never run out of batteries. Instead of purchasing more alkaline batteries, the money I saved help me to purchase another pack of Yuasa precharged AAA batteries.

They work fine, and a bit cheaper than the competition. Do not have enough experience to know how long they last.

the product is not too spectacular as it discharges a little too quickly, it works fine though and charges within the stated hours too.

I have been very pleased with this purchase. So many remotes and other devices require AAA batteries. You cannot really have too many. The batteries work with a recharger I already owned. They were bought over a year ago and are still working fine. I would buy this product again. I will try to update in the future to verify their longevity.

I purchased these batteries awhile ago with another product so I could get free shipping. I figured rechargeable batteries would be a good investment for my desktop computer's wireless keyboard.
The batteries are still working great and since my keyboard only uses two batteries, I always have another pair ready to go when the current in-use batteries need to be recharged.

Bought these to save on shipping, but they turned out to be a smart purchase.

I guess it's good that I bought two sets, because one set it always in the charger. These batteries run down faster than any other brand I've used.