About: http://webisa.webdatacommons.org/51801082

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Their prices are not particularly high, box has space allocated for them and there is a built-in charger, so I think it is still quite practical.
http://www.w3.org/ns/prov#wasQuotedFrom	head-fi.org