Circuit Board guys - is this leaking electrolyte or glue or...?

[brutal]

Glue

Leaky Electrolyte would be wet and greasy if fresh or dark and discolored if dried.

Inspect the solder side of the board for annular cracks at the component solder joints.

[Brian]

Somebody spooged all over the board before closing it up at the factory...........

Now that you broke the factory seal on the charger, the warranty if any is void.

There was no factory seal, just 4 screws.

[Brian]

Going to see if I can contact the seller and see what they're willing to do for me.

[Duman]

"Haha, we make round eye crazy with monkey spunk on circuit board......"


Or its a "potting compound/sealant"

[Duman]

It looks like glue from a hot-glue gun.

Lithium batteries are not to be messed with, they require a charger specifically for Li batteries. The commercial Li batteries used in oil/gas exploration contain other chemicals that, when exposed, will rip out your lungs.