AA to D cell adapter

[kemasa]

What about memory? You did not mention that problem.

You charge them up and let them sit. The batteries drop to 65%. You charge them up from 65% to 100% now they have memory from 100-65 and that is the full range of charge held by the battery. Best of luck with that. In my opinion if its not Lion or eneloop it is a FAIL.

Toyota did years or research and testing before they made the Prius battery and guess what. They had to run all kinds of special charge programs on it to make it work correctly. They could only use the battery between 45-85%. Anything out of that range damaged the battery. They have now moved to Lion type batteries.

I have not seen that issue. The Centura batteries are like the Eneloops, as I understand it, which is what I use as I hate the self-discharge.

I have seen the memory issue with NiCads, but not with NiMH.

There are many issues with charging batteries. BTW, the charger that I have also has the ability to drain the battery and then charge it back up again automatically.

[problemchild]

I have not seen that issue. The Centura batteries are like the Eneloops, as I understand it, which is what I use as I hate the self-discharge.

I have seen the memory issue with NiCads, but not with NiMH.

There are many issues with charging batteries. BTW, the charger that I have also has the ability to drain the battery and then charge it back up again automatically.

Hmmm... Maybe they are better quality? I have many nimh batteries that died after I let them sit too long even with a refresh recharge.

[kemasa]

Most of my uses for batteries of that type involve long term sitting around, not charge, use, charge. Due to this, I did not use NiMH much since what good is a battery if it is drained by self-discharge when you need it? With the Centura batteries, they work when I need them.

I have heard of ways to recover old NiMH batteries, but I don't recall the procedure.

I don't know if the Centura batteries are a better quality, but they are a different type, which is low self-discharge, which makes it much better for my applications.

[bohoki]

i have some single aa to d but they just expose the negative end and have a little button that extends the positive problem is a few of the d cell stuff i use wants a large bit of negative surface to connect the spring

i got some d cell nicads old i know but at 4000 mah they last plenty long


i'm not sure how the mah rating is calculated but i got some 2500 mah aas but they will not provide 2 amps for one hour but they seem to be able to provide a half an amp for like 3 hrs

[ExtremeX]

Hmmm... Maybe they are better quality? I have many nimh batteries that died after I let them sit too long even with a refresh recharge.

I started to hate NiHM cells since I used to own a lot of tenergy NiHM cells. I have since trashed all 36 cells.

The Centura are (LSD) Low Self Discharge similar to the eneloops....
I still think Sanyo Eneloops have a better edge. 3 years storage and still maintains 75% charge.

http://www.eneloop.info/home/performance-details/self-discharge.html

Their batteries are also very consistent, manufactured top quality in Japan. I use then exclusively for AA batteries now. They maintain a higher discharge voltage than the Centura cells. They just peform better all around.

[kemasa]

The claims for the storage charge appears to be identical for both batteries, at least for the first year:

http://www.all-battery.com/nimh_centura_list.aspx

It is not listed for longer than that for the Centura.

I don't doubt that the Eneloops are better, but the price is also higher.

[ExtremeX]

The claims for the storage charge appears to be identical for both batteries, at least for the first year:

http://www.all-battery.com/nimh_centura_list.aspx

It is not listed for longer than that for the Centura.

I don't doubt that the Eneloops are better, but the price is also higher.

The Centura cells are same as OLD Eneloops... HR-3UTG

http://www.eneloop.info/home/the-new-improved-eneloop.html

1 Year to 85%, after that they start to drop off faster. There is a reason they don't publish discharge data after 1 year.

The NEW Eneloops HR-3UTGA, only loose another 10% after 2 years, huge improvment. Plus 500 more charge cycles and -10c vs -20c for cold weather peformance.

I dont think you can even find the old Eneloops anymore. Costco sells a 10 pack of AA Eneloops for $20. So its actually about the same price as the Centura.

There is no reason not to go with Sanyo

[kemasa]

Where can you get D-cell Eneloops for a decent price?

I was not aware of the change, thanks!!

[ExtremeX]

Unfortunately the only downside is they don't have a standard C or D cell.

Both use adapters utilizing the AA battery.

http://www.eneloop.info/products/accessories/adapter.html

Its really not that big of a deal... It standardizes the types of chargers and cell types buying only AA...

Tenergy D cell = 8,000mah
Eneloop AA = 2,000mah

Since they are rechargeable, I never really had any issue with capacity, but you will be changing the Eneloops more often since you will be dealing with a 2000mah cell. On the upside, AA cells are smaller and you can carry more of them.

I think application plays a big role here. If the D cells are going to be used in a boombox, I rather take the capacity. Most of mine are used in high performance flashlights, GPS, and other various devices where it may be in storage longer than in use.