Is it ok to use a $18 replacement battery

I see newpower99 sells replacement battery for the T800 for $69. Then there's an eBay merchant that sells one for $18

http://ift.tt/1U1BE1O

Anybody with experience with these? Maybe the cheap battery will blow up in my face or maybe newpower99 just grossly marks up?

from xda-developers http://ift.tt/1XDbQ1f
via IFTTT