[Mike Betts]

Originally Posted by Don Rotolo

Also can be charged in any position

Don,

I would not charge a SLA in anything other than the upright position. Even though it is a sealed unit, there exist vents at the top of the battery. Any material (example: acid gel) which plugs the vents will be forced out by the hydrogen gas produced during charging. These vents are designed for gas only. A plugged vent could produce a rather violent rupture when charging.

And if you don't agree with my analysis there is this from the 2007 manual:

3.14.3 Pit and Competition Safety

Battery Safety: (Sealed Acid Lead)

Charge in an open, well-ventilated area. Do not charge near an
open flame or near equipment that may produce sparks. Do not
use smoking materials in the battery charging area. Charge in an
upright position. It is not safe to charge the SAL battery in an
inverted position.

Regards,

Mike