General > General Technical Chat
Rechargable vs. Non-Rechargable Batteries - AA/AAA Size
retiredcaps:
--- Quote from: retiredcaps on July 24, 2021, 03:05:29 am ---I finally found my first set of AA Eneloops. They are 10+ years old.
The last time I ran a capacity measurement on this initial set, I think it was still close to 1900mAh.
--- End quote ---
Ran discharge capacity test yesterday on the two cells above. I get 1894 and 1869 mAh. Not bad after 10+ years and > 1500 cycles.
Halcyon:
I guess this brings me to my next question... can anyone recommend a good quality smart charger? Ideally it should support the usual sizes at least (AA, AAA) but 9 volt and C size would be a "nice to have".
It should also have a discharge mode and ability to evaluate life/capacity.
I'd like it to be a "table top" model, rather than those big chunky plug-in/wall-wart types.
Berni:
I use one of these for all my batteries:
http://www.liito-kala.com/page92?product_id=6
Yes it is chinese, but it is a well known chinese brand (So watch out for counterfit fakes of it). But it is cheap and works well. Takes all the popular battery types and auto detects the chemistry. It has adjustable charging current, measures the charge time and capacity along with cell internal resistance (tho that last feature doesn't seam all that accurate for me). It also runs from 12V so it fits on a lot of common 12V power adapters and includes a cigarette socket cable. It also has modes for testing capacity of a battery where it puts it trough a full cycle, tho that feature is a bit slow since it does not have active cooling, so it can't discharge very fast.
Only thing to watch out for is to not leave batteries inside it when it is disconnected from power. This makes it go into battery bank mode where it uses the power from the batteries to power that 5V USB socket, so it can drain the batteries over a long period.
Miti:
I have this one and I’m happy with it:
https://mahaenergy.com/mh-c9000/
David Hess:
--- Quote from: Halcyon on July 30, 2021, 03:25:46 am ---I guess this brings me to my next question... can anyone recommend a good quality smart charger? Ideally it should support the usual sizes at least (AA, AAA) but 9 volt and C size would be a "nice to have".
It should also have a discharge mode and ability to evaluate life/capacity.
I'd like it to be a "table top" model, rather than those big chunky plug-in/wall-wart types.
--- End quote ---
I have a now discontinued MH-C9000 which works well enough but after a couple years of light use, the aluminum electrolytic capacitors needed to be replaced. This is not the first time I have had to do this and I suspect this is a common problem on all similar chargers.
It has a poorly designed user interface which apparently the MH-C9000PRO which replaced it has fixed.
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