Notebook Battery Life
For more information on how we test notebook battery life, click here.
The two M.2 products are not comparable with the 2.5" form factor drives. We test M.2 SSDs in a Lenovo X1 Carbon Gen 3 and 2.5" products in a Lenovo T440p. You can compare battery life with other M.2 SSDs toward the end of this page.
The 2.5" JMF670H-powered SSD scored low on our chart, but is average for client-oriented 2.5" SSDs currently available. This is one of the last puzzle pieces that controller vendors optimize for, so it's also possible that we'll see an improvement once the processor finds its way onto retail products.
Notebooks running on battery power reduce system bus speeds to conserve power. The CPU, PCIe and DMI all drop down to lower power states and this affects storage performance. Some devices handle the reduced power state differently. Those that do well under these conditions are considered efficient; others simply perform poorly.