After never having seen this phenomenon on any of my batteries before I noticed the positive of my auxiliary battery was severe. I also noticed that the plastic coating on one of the connectors on the positive from the controller was deformed. Thinking it was arcing because the connection was loose I checked buy it doesn't seem the case. No evidence of any heat buildup anywhere else.
What us causing this sudden sulphation?
Sent from my half-eaten fruity mobile device!
Site Admin
No bright spark cough cough able to offer an opinion?
Simon Bloomer
Well no, I wouldn't be able to help, BUT! I am very interested to find out the reason, as well as a solution to this. The deformed plastic must result in heat right? Thus is the Aux bat laboring .... I know to little, but its scary
PAJERO 3.2 LWB GEN 4 AUTO
Rocksliders|Roof Rack|Bash Plate|Suspension lift|Dual battery system|
Rocksliders|Roof Rack|Bash Plate|Suspension lift|Dual battery system|
If only you had a half decent camera to post some pics, it could have helped. 
The cause of the build-up (all of a sudden) has me stumped.
I have a way of dealing with the build-up, but I don't think that's what you are after.
Sulfation/sulphation is a build up of lead sulphate crystals on the battery plates during the normal charge/discharge cycles.
I don't think that is what you are referring to.
I think you are referring to the accumulation of acidic crystals on the terminals, which forms when acid vapours cause corrosion of the metal.
This problem should not happen if you have a sealed battery (good reason to get sealed battery).
I solve this by covering the terminals with a mixture of grease and bicarb of soda (1 tablesppon grease + 1 teaspoon of bicarb, well mixed).
The cause of the build-up (all of a sudden) has me stumped.
I have a way of dealing with the build-up, but I don't think that's what you are after.
Sulfation/sulphation is a build up of lead sulphate crystals on the battery plates during the normal charge/discharge cycles.
I don't think that is what you are referring to.
I think you are referring to the accumulation of acidic crystals on the terminals, which forms when acid vapours cause corrosion of the metal.
This problem should not happen if you have a sealed battery (good reason to get sealed battery).
I solve this by covering the terminals with a mixture of grease and bicarb of soda (1 tablesppon grease + 1 teaspoon of bicarb, well mixed).
Gerhard Fourie
If you want to shoot somebody, make sure you aim at his head, not your own foot.
Me
If you want to shoot somebody, make sure you aim at his head, not your own foot.
Me
Site Admin
Gerhard
Yes it's a build up of crystals on the terminals.
It's a deltec sealed auxiliary battery, so should not be leaking (unless it got damaged, but not sure how that's possible)
I'm wondering if my battery is starting to go belly up.
Yes it's a build up of crystals on the terminals.
It's a deltec sealed auxiliary battery, so should not be leaking (unless it got damaged, but not sure how that's possible)
I'm wondering if my battery is starting to go belly up.
Simon Bloomer
Clean it properly and check for dampness on the seams (= leak).SimonB wrote: It's a deltec sealed auxiliary battery, so should not be leaking (unless it got damaged, but not sure how that's possible)
Acrid acid smell during charging is often a dead give away.
If you have litmus paper (ask your chemist for a few), put a damp one near the terminals. Acid fumes will change the colour.
With what do you charge it?
Alternators do this to aux. batteries (over-charging).
Gerhard Fourie
If you want to shoot somebody, make sure you aim at his head, not your own foot.
Me
If you want to shoot somebody, make sure you aim at his head, not your own foot.
Me
Site Admin
It's been in my engine bay for 4 years... why now?4ePajero wrote: With what do you charge it?
Alternators do this to aux. batteries (over-charging).
Simon Bloomer
The alternator sees the two batteries as one, so when one battery's internal resistance changes, the alternator will act as if both have the same characteristics, and charge accordingly.
it is a known fact that the rapid charge rates associated with alternators are not ideal for deep cycle batteries.
Good time to consider a CD-DC charger for the aux. battery?
it is a known fact that the rapid charge rates associated with alternators are not ideal for deep cycle batteries.
Good time to consider a CD-DC charger for the aux. battery?
Gerhard Fourie
If you want to shoot somebody, make sure you aim at his head, not your own foot.
Me
If you want to shoot somebody, make sure you aim at his head, not your own foot.
Me
Mitsubishi Garage spray's mine every time I take it for a service, with a aerosol can with something in it to prevent it Maybe go past them and ask them or give them a call.
PAJERO 3.2 LWB GEN 4 AUTO
Rocksliders|Roof Rack|Bash Plate|Suspension lift|Dual battery system|
Rocksliders|Roof Rack|Bash Plate|Suspension lift|Dual battery system|