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This
is a safety feature of some battery chargers. It make it difficult
to:
- charge a 6V battery with a 12V
charger
- get a dead short across the charger
leads
- attach the charger with reverse polarity (back
the front)
These
are good things.
The
down side is that you can't charge a dead flat battery.
I have a sealed lead/acid 12V rechargeable
battery that I use to power my spotlight. It should provide about an hours use
before going flat but it conked out after ten minutes and I wasn't able to
recharge it.
I took it back to Battery World and they
found no problem with the battery or the recharger. After a long
conversation with the very helpful salesperson I discovered the plug in recharger will not or will have trouble
recharging the battery if the charge in the battery has less than about 10 V
charge remaining. This means that
once the spotlight starts to dim it is wise to stop using it and recharge the
battery. I had run down the battery thinking the battery had "memory". I
know now that this concept only applies to nicad type batteries.
Battery World were able to fully recharge the
battery so hopefully there will be no further problems.
Allan
PS Battery World can supply a battery
with "cigarette lighter" adaptor and carry case for about
$80.
Allan
Benson
Ourimbah
NSW
43627189
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