Yuasa - 2-Pack of AA Ni-MH Rechargeable Batteries (2700mAh)

by Yuasa

Product Details

• Product Dimensions: 4.4 x 3.8 x 0.8 inches
• Shipping Weight: 8 ounces
• ASIN: B002PJN6VE
• Average Customer Review: 2.0 out of 5 stars  See all reviews (2 customer reviews)
• Date first available at Amazon.com: September 17, 2009

Product Description

Yuasa high-capacity 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, and occasionally beyond, 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.

Customer Reviews

Most Helpful Customer Reviews

2 of 2 people found the following review helpful:

3.0 out of 5 stars A bit of a disappointment for Yuasa, September 15, 2010

By 

HMMWV "God, Country, Corps" (santa clara, CA USA) - See all my reviews
(TOP 100 REVIEWER)    (VINE VOICE)   

Amazon Verified Purchase

This review is from: Yuasa - 2-Pack of AA Ni-MH Rechargeable Batteries (2700mAh) (Electronics)

I bought 4 of these batteries from Yuasa instead of sanyo's 2700 mAH offering because I've had really good luck using Yuasa lead acid cells (e.g. 12V, 7.2 Ah) for years in alarm systems, etc. I had a good feeling about Yuasa after the decade of service I have had using their lead acid offerings.

I was a bit disappointed in the charge retention of the Yuasa NiMH conventional technology 2700 mAH. For example, the Sanyo 2700 AA's normally charge to 1.46V then drop to 1.43V after 24h then decline as predicted for normal NiMH cells. The Yuasa batteries charged to 1.46 then dropped to 1.37V in just a few hours when charged at 1/10 C and cycled 3 times, a fairly standard breakin proceedure for NiMH cells. That ~.06V drop x 4 cells is almost 1/4V lost in a 4xAA system loaded with cells fresh out of the charger compared to Sanyo cells. While not as bad the 1AH imported cells labeled 2500, 2700, and even 2900 mAh, they are not nearly as nice at charge rating accuracy and retention as the Sanyo.

Of all capacity tests, none has ever really tested at 2700 MAh from any brand as I measure down to 0.9 volts and 200 ma draw which closely represents my usage - Sanyo's 2700 capacity dropped recently and now usually tests 2490-2530 MAh, and Yuasa measured 2260-2280 MAh. I will say that the Yuasa cells were very closely spaced, while Sanyo's often have 1 out of 4 that may be 200 mAh down from the other 3. Several of these cells have failed permanently now.

The worst news for the Yuasa cells after breakin wake up was the Yuasa button (cell top) size. It's much smaller than all the other brands I've used and does not make contact in 100% of AA powered devices. It works fine in my Zoom H4n but all 4 positions in my Marantz PMD 661 missed touching the button by about .050". Yuasa's button is not as tall nor as wide as other NiMH button top designs from many vendors. It's lack of height may make it unusable in devices that have a shoulder with a recessed positive contact in their battery compartment insted of a flat terminal contact design, or where batteries are stacked in series and the most positive touches a flat plate.

My other motivation to try the Yuasa was to see if every brand has a weak cell out of a 4 cell pack treated equally over their life as a set. I will probably use the Yuasa cells in my wireless mic transmitter/receiver pair instead of the recorder to see how they last - watch for updates as to how these behave over time.

1.0 out of 5 stars Arrived with no life, March 29, 2011

By 

LisTee - See all my reviews

Amazon Verified Purchase

This review is from: Yuasa - 2-Pack of AA Ni-MH Rechargeable Batteries (2700mAh) (Electronics)

Batteries arrived with no life in them. Could have been a one off situation but did not ask for a replacement. Money was refunded promptly.