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Subject Topic: Lithium ion AA and D cell
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PersonFrancais
16/7/2017 at 8:53am
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No Bramston, it just won't charge as the 1.5v circuit of the Kentli cell is output only.

I have gone of the idea of using the Kentli cells, NiMh for me at least is fine for my 1.5v applications.

I am now just looking at kit that can accept 18650 lithium ion cells, or I may just hang on untill the new 2170 lithium ion cell becomes main stream, that will be the game changer.


PersonGrampian91
16/7/2017 at 5:20pm
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The charger is a special one, It does not charger through the central nub on the AA size battery.

It actually charges through the outer ring which is 3.7 volts.

I think it will be a long time before 2170 cells arreap on the market at a sensible price. They will all be snapped up for the cars and solar storage. Any that sneak out past that will be at a premium.

I like the way they credit Tesla mostly yet they were developed with Panasonic which i think know a lot more about battery chemistry than Tesla.

I cannot believe that the US goverment are pumping so much money into them and yet they still cannot make a profit.
How is a company that does not make a profit and losing $1billion a year worth $45 billion?

A lot of secret handshakes and manipulation me thinks.


PersonFrancais
16/7/2017 at 6:38pm
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I agree it has to be Panasonic who have the battery know how, why else would Tesla be in bed with them.

I notice that Panasonic are the makers of the NiMh Eneloop batteries, so I would not dispute that they are as good as they claim.

As for the 2170 it will eventually become mainstream, if the voltage is the same 3.7v as the 18650, then that will be good for future proofing kit, making it ready for 2170, but running of 18650 cells in the meantime.

I did read somewhere that the Tesla model 3 will have a max battery pack of 75kwh, but will use a lot less cells than say a 100kwh Model S, which has around 8000! of the 18650 cells, maybe the model 3 will use just 4000 cells.

That's still a lot of cells if they are aiming at producing 20,000 model 3 cars each month by the end of the year.

In fact that would require 80 million 2170 cells to be available each month, just for the model 3 production.

Post last edited on 16/07/2017 18:59:17


PersonWestward
16/7/2017 at 8:17pm
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Quote: Originally posted by Francais on 16/7/2017
I agree it has to be Panasonic who have the battery know how, why else would Tesla be in bed with them.
I notice that Panasonic are the makers of the NiMh Eneloop batteries, so I would not dispute that they are as good as they claim.

Actually it was Sanyo, which Panasonic acquired, that created Eneloop, but Sanyo is also a solid, capable, engineering-driven company. I would certainly agree that Panasonic holds the battery expertise, not Tesla (Panasonic was supplying batteries for the Toyota Prius before Tesla vehicles existed).

I attended presentations in Tokyo on the Eneloop technology when it was first announced many moons ago. The claims Sanyo made then seem to have been borne out by real-world experience. They really do hold their charge.

[Edited for clarity]

Post last edited on 16/07/2017 20:30:07


PersonFrancais
16/7/2017 at 8:49pm
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Thanks Westward, I noticed on the Panasonic Eneloop website that "C"(LR14) and "D" (LR20) batteries are shown, but I am guessing that they are just Dummy holders to take the Eneloop "AA" batteries.

I am thinking this because there is no specs given for the "C" or "D" batteries.


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Personcampergiles
19/7/2017 at 11:04am
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Quote: Originally posted by Francais on 15/7/2017
Out of curiosity I have just tried 2 of the Aldi NiMh AA cells in the Sony SW1 and guess what it's working, will give it a soak test to ensure that this is not a fluke.


My Sony ICF-SW7600G SW radio (similar vintage and quality) has run for years on NiMH AA batteries with no problems.

I've generally moved across to the Eneloop (or LSD/low self discharge) NIMH batteries now, as they do keep their charge for ages. A great improvement and worth the cost.

I use some 18650 Li-Ions for bigger LED torches, but otherwise am happy with NIMH AAs.


PersonFrancais
19/7/2017 at 11:58am
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Yep I might just get some Eneloop "AA"'s campergiles, nice radio BTW, they don't make them like that anymore.



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