In a message dated 12/24/01 9:56:22 PM Eastern Standard Time,
randallyoung@earthlink.net writes:
<< ZinkZ10C@aol.com wrote:
>
> Since the top is sealed
Not true ! All lead-acid car batteries have a vent, with the sole
exception of Optima. If you turn a Delco upside down and then charge
it, you'll find out where the vent is ! >>
True! Was thinking more along the lines of non removable caps rather than no
vents. The Delcos do have two oval relief vents ( one on each side ) that
will allow pressure to escape if the battery is overcharged. In normal
operation, no acid is expelled through these vents. If the battery is used
in a enclosed area, thin wall tubing such as Tygon can be slipped over the
vents.
Most car batteries are considered "Flooded" due to their liquid electrolyte.
Sealed Lead Acid batteries ( SLA) also sometimes called gel cells, starved
electrolyte or acrobatic aircraft batteries must have a overpressure relief
to prevent explosion. The Optima needs to have some sort of overpressure
system. From what I've read, charging any SLA upsidedown is not recommended
thought they can be discharged in this position.
Harold
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