Universal Notebook Battery 70 for $100

Not sure if this is an appropriate post but ... perhaps someone might want to buy this from me. I have an external battery which is great for use with laptops. Are you ever in a situation where you are using your laptop but have run out of power and can't find an electric outlet? I have. That's why I bought this battery from Amazon.

It worked great with my Dell laptop. But now that I've switched to a MacBook Pro, I can't use it because it's incompatible with the mac.

I purchased it for $142 online from Amazon in March. Now it's going for $162. I only used it for a few months.

I'll sell it to whoever wants it for $100.