Re: High-capacity NiMH cells -- very rapid self-discharge common?


? "ransley" <Mark_Ransley@xxxxxxxxx> ?????? ??? ??????
news:a002978a-a9c9-4f0a-ae86-abf4502b01a8@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
On Jun 25, 11:40 am, "Tzortzakakis Dimitrios" <no...@xxxxxxxxxxx>
wrote:
Ï "Neil Harrington" <n...@xxxxxxxxxx> Ýãñáøå óôï
ìÞíõìánews:rdOdnQTfrevcfvzVnZ2dnUVZ_gOdnZ2d@xxxxxxxxxxxxxx





"ransley" <Mark_Rans...@xxxxxxxxx> wrote in message
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On Jun 24, 5:43 pm, "Neil Harrington" <n...@xxxxxxxxxx> wrote:
"ransley" <Mark_Rans...@xxxxxxxxx> wrote in message

news:9aac17c6-752c-4db5-933a-f7a8c4f8c6d1@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Have you put a V meter on them to see if they even charge and what the
discharge is. I can let them sit a month and still have use, but not
cheap no names. Try Eneloop are a different design, but measure what
voltage your chargers give, mine charge to 1.5v or so

________________

Good idea, I will check the charging voltages. But my Maha chargers are
the
same ones I've been using with other NiMH cells for a long time, with
no
problems.

As for discharge, I suppose I could get a suitable resistor from Radio
Shack, rig up a multitester somehow and plot the discharge curve -- but
that's really more tedious than I care to get into, unless there's a
simpler
method that hasn't occurred to me. I used to do that 30+ years ago with
NiCd
battery packs when I was flying R/C models.

Neil

I just meant check the voltage when they dont work, my old old cells
still charge to 1.35-4, it could be the camera, but Sanyo, Panasonic,
Duracell, Energiser are good. Running RC stuff im suprised you dont
stick with Sanyo as they are the standard of quality. Eneloops I think
are the way to go, slightly less amps but a little self discharge.

______________________

OK, I see what you mean. But I'd still have to check the voltage under
load for it to have any meaning, wouldn't I? Or isn't that so?

As for the R/C stuff, that was over 30 years ago; we only had NiCd then
and the battery packs came already made up, no individual cells. (Maybe
individual cells for electric power, dunno about that -- it was rare
anyway.) The flight packs for conventional planes were usually 500mAh
though there were also small 225mAh packs for the little 1/2A models. I
have no idea what the R/C guys are using now.

Here, they are using ethanol. A tiny reciprocating engine with a spark
plug,
which is activated only at start (the spark plug).
I am using Sanyo normal NiMHs on my maglite, and one charge lasts me
months
(I use it occassionaly, eg when I have to check a water heater which is in
a
dark closet). I also have MW batteries that came with the 6 euros 150 mA
constant curent charger (certainly made in China) and I get a week or more
battery life in my little transistor radio which I use at work, also 9-5.
I
also found a pair of MINWA (MW) batteries in my satchel, that were there
since last summer (I use it when I go to the beach) and I measured them,
and
they appear to be charged. (Common NiMHs, 2000 mAh, not Eneloops). I
stronly
recommend you go out to your town/city and check what's on sale, compare
prices/brands and the like, even for a couple of batteries.

HTH,

--
Tzortzakakis Dimitrios
major in electrical engineering
mechanized infantry reservist
hordad AT otenet DOT gr- Hide quoted text -

- Show quoted text -

That would be Nitro Methane and perhaps alcohol and oil, and its for
your camera?


No, my camera uses electricity:-0


--
Tzortzakakis Dimitrios
major in electrical engineering
mechanized infantry reservist
hordad AT otenet DOT gr


.

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