Two Volvo alternator questions

[meep]

That’s weird about it missing the clamp-down lip. I’ve had both wet and AGM, H6 and H8 in those P2s and they fit without a second look. I too quite appreciate the trunk-stowed batteries - they last a long time back there and balance the vehicle out nicely. AND you can stick a full-sized spare back there!

 

[willbur]

14.8 Maybe an the high side of marginal but you said up to 15.4V is OK. Definitely not for lead acid.

Every lead acid battery has a vent. It must - the charging process creates hydrogen. Not venting would create a explosive hazard. Just because it doesn't have a service port does not mean its sealed. It has a vent still. It must. You just can't add water.

Your equalization/recondition recharger uses high voltage at very low current in short pulses - which is done specifically to break down sulfate in the battery. Its not sustained and is only done in burst short enough to not incur much charge. Very different.

Boiling off is the term everyone uses for lowering vapor pressure causing more off gas. Every old mechanic used this term.

"High voltage at very low current..."? At any given battery internal resistance, high voltage must produce high current is my understanding of Ohms law. Please explain