Help charger tip

[kenstar117]

I have recently bought a portable charger from maplin (6000mAh Portable Power Bank for Mobile Devices : Portable Power : Maplin Electronics) but it did not come with a charging tip for my Acer 500 tablet. Does anyone know what size of tip I need or can supply a link where I could buy one?

Cheers
kenstar117

 

[zuben el genub]

It's G and I wouldn't trust the charger.
The tip is a bit too long. I've seen hacks for it, but convoluted.