<https://batteryclerk.com/products/pcm-powercom-black-knight-pro-bnt-500a-12v-7ah-ups-replacement-battery>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://batteryclerk.com/products/pcm-powercom-black-knight-pro-bnt-500a-12v-7ah-ups-replacement-battery>