Archived from groups: alt.comp.periphs.dcameras (
More info?)
Rolf Egil Sølvik typed:
> On Tue, 18 May 2004 15:14:05 -0700, "Rick" <me@privacy.net> wrote:
>
>> 2. Make sure your recharger is compatible with the batteries.
>
> I've got a PowerStation TC Max from www.Hahnel.ie that came with 4
> 2000mAH NIMHs in a set (a slow 10-11 hours charger w/t timer).
>
> Will it charge their new 2350 mAHs properly when I see the new
> charger is 230mA and not 200mA as my charger is? Or will I have to
> get a new charger if I get the 2350s?
As for original question goes - it's perfect. It doesn't matter, which
capacity you have, it's voltage which matters, but this is always 1.2 Volts
for rechargeble and 1.5 volts for Alkalines. It's just higher capacity,
longer shooting time without recharge.
To Rolf:
new batteries with 2350 mAh will be just fine, they will however need a bit
more time to recharge. Normally you calculate charging time as capacity /
charging current and add about 40 %. Which for 2000 mAh set goes 2000/200=10
hours, plus 40% is 14 hours. Your batteries (2000 ones) are not fully
charged after 10 hours, if charging current is 200 mA, even if it says
so(note that they get warm, which means that some amount of loss is
present). Leave them in at least 14 hours . While 2350 ones will take
2350/200=appr.12 hours plus 40%=appr. 17 hours. It's just when you charge
batteries with high current, you must monitor voltage and temperature, while
all this is not needed if charging with low currents.
However, note that NiMH batteries quickly self discharge - about 1 % per
day, which means that if you leave them for a month, they will have only
about 70 % of charge left. So, it's better to get yourself some smart
charger, which after set time switches to "trickle" charging (slow - 50 - 80
mA), so, in such charger you can keep batteries in all the time and they are
always full. Like one slow charger from GP, which has 18 hours timer and
after that switches from 150 mA to about 60 mA (i have 1800 mAh batteries).
In such state i can leave them connected for month or longer. When i need
them i take them and they are for sure full.
But, at the end, some quick charger can at the end of batterry life
sometimes extend their lilfe, since hi current can wake-up dead batteries
back to life for a while, so maybe you should consider to get some quick one
(like 3 hours or 1 hour type).
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