What's causing my battery to undercharge?

[Darkstar]

I'm using a one year old [12V 14.5 Amp MotoBatt MB10U 175CCA AGM Battery] which has two sets of leads. The first set is driving everything and looks clean. The second set, empty, has white corrosion on the negative terminal. People say this is caused by undercharging. Although not serious, it could shorten its life. Any idea why and what the fix is?

[the_63]

This link is for car battery, but yuasa also make batteries for bikes. Sadly it does not give a fix, but begins to explain battery faults...

[Big Rich]

I've never heard of corrosion on an unused terminal being caused by undercharging...... who are the people that say that?

Better question: is your charging system working properly? Some quick tests with a multimeter will tell you (positively) more than some corrosion......

[mr72]

I've never heard of corrosion on an unused terminal being caused by undercharging...... who are the people that say that?

the summary of the first Google result says that.

to the OP: you shouldn't have corroded terminals on an AGM battery, and if you do then it might be leaking electrolyte (although maybe very slowly). It wouldn't really indicate the system is undercharging anyway, it just indicates that the affected terminal has a negative charge. Just clean it and apply some anti-corrosive to it, whatever you get from the auto parts store will work fine.

Better question: is your charging system working properly? Some quick tests with a multimeter will tell you (positively) more than some corrosion......

+1 that!

[Darkstar]

Better question: is your charging system working properly?

yes. thought it'd be safe to ask anyway. thanks!