A good rule of thumb is to charge at 10% of the batteries capacity (or
less), an automatic motorcycle batterie charger should work fine.

Subject: [EE:] Recharging sealed lead acid battery


> I've got a sealed lead-acid battery I need to recharge.  It's a 12V, 17
> amp-hour battery I got surplus from All Electronics.  Is it OK to just
hook
> it up to a 12V car battery charger?  Surely that would be too easy...
>
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