Small hole in lipo battery

[Kingleo619]

So was curious to know, what is the little hole for in between neg/positive port it’s on my 2s protek lipo

Zoom in of course

 

[nino]

TO plug in one of the balance wires. There's no balance connector on this type of pack, so you need a specific harness for charging them.

 

[Kingleo619]

TO plug in one of the balance wires. There's no balance connector on this type of pack, so you need a specific harness for charging them.

?

 

[Mongoose]

?

If you have this battery then you should probably get that connector so you can balance the cells.