How to Charge my 12V Starter battery?

[Steve Rowbottom]

I managed to get hold of a sealed lead acid 12v 7.2 Ahr battery to use with
my Hyper 7 starter box, whats the best way to charge it - can I just use my
car charger?

Thanks,

Steve.

[Chris Dugan]

"Steve Rowbottom" <steve_rowbottom@bigfoot.com> wrote in message
news:NCGGc.173$9M4.79@newsfe5-win.ntli.net...
> I managed to get hold of a sealed lead acid 12v 7.2 Ahr battery to use
with
> my Hyper 7 starter box, whats the best way to charge it - can I just use
my
> car charger?
>
> Thanks,
>
> Steve.
>
>
Only if your car charger can charge SEALED batteries, they require a
different charging regime to normal lead acid (car batteries), they usually
have better voltage regulation and a gradually reducing current. Most
automatic car chargers just pump in unregulated power from a transformer
until the voltage reaches a certain point and then switch off or to a lower
maintenance voltage which could potentially kill a sealed battery due to
overcharge.

Chris


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[BDM]

I charge mine using a car charger set at 2A. YMMV.

In article <NCGGc.173$9M4.79@newsfe5-win.ntli.net>,
steve_rowbottom@bigfoot.com says...
> I managed to get hold of a sealed lead acid 12v 7.2 Ahr battery to use with
> my Hyper 7 starter box, whats the best way to charge it - can I just use my
> car charger?
>
> Thanks,
>
> Steve.
>
>
>

[George Williams]

Steve Rowbottom wrote:
>
> I managed to get hold of a sealed lead acid 12v 7.2 Ahr battery to use with
> my Hyper 7 starter box, whats the best way to charge it - can I just use my
> car charger?

Charge it at 0.2C (0.2*7.2) or about 1.5 Amps, until it gets up to
12.0 V. Then the charge should decrease gradually, until the battery
reaches 14.25 V at 0 Amp charging current. If the car charger is
a trickle charger, it might work. If an old sealed battery is dead,
it may be sulfated, and it won't charge with a typical charger.