Dell Dura Ace and Tesla portable power companions

The Dell PW7015M “Dura Ace” and PW7015L “Tesla” are portable power banks marketed as “power companions.” The PW7015L appears to be a design revision from late 2018, while the PW7015M is a design revision from late 2014. These power companion designs pre-date USB-C input or output and use the Dell barrel jack (7.4×5.0mm or 4.5×3.0mm, […]