 Most consumer-class SSDs do not have built-in batteries or capacitors; among the exceptions are the Crucial M500 and MX100 series, the Intel 320 series, and the more expensive Intel 710 and 730 series.Enterprise-class SSDs, such as the Intel DC S3700 series, usually have built-in batteries or capacitors.The host interface is physically a connector with the signalling managed by the SSD's controller.