The Shargeek 300 has the same 24,000mAh (or 86.4Wh) capacity and 140W input as its 170 forebear - although the DC port among its I/O marks it out as a true successor to the Storm2 (now known as the Shargeek 100).
Sharge touts it as the best upgrade for that power bank possible with a new "premium transparent" chassis - which also integrates tunable RGB for the first time.
Its "compact" design also integrates a Smart Display, touted to show more detailed charging and discharging data than that of its predecessors.
The 300 is also backed to be the first of its series to achieve a total output of 300W, which should allow it to charge 2 MacBook Pro 16s at the same time.
Its starting price will be revealed on the launch of Sharge's latest Kickstarter campaign, which is billed to happen "soon". For reference, the Shargeek 100 is listed on Amazon at $159.