The phrase "albeit efficient" is correct and usable in written English.
It is typically used to introduce a concession or contrast, indicating that something is efficient, even if there are other considerations or drawbacks.
Example: "The new software is expensive, albeit efficient, which makes it a tough decision for the budget-conscious team."
Alternatives: "though efficient" or "even if efficient".
Albeit efficient, neither strategy is complete.
These robots, albeit efficient, have complex structural designs and driving systems.
In an attempt to strengthen his position, Charles generated great antipathy in London, which was already fast falling into anarchy, when he placed the Tower of London under the command of Colonel Thomas Lunsford, an infamous, albeit efficient, career officer.
Primary human monocytes are relatively refractory to single round infection or full replication of HIV-1 [3], [3], albeit efficient infection of monocytes, DCs or macrophages can be achieved by using high amounts of input virus [23], [32], [33].
In heterologous (artificial polyprotein) contexts, the 2A sequence remains as a C-terminal extension of the upstream gene: potentially a consideration when using longer, albeit more efficient, F2A sequences.
With his fighting chops and emotional dysfunction, Manit is efficient, albeit with his extremities, not firearms.
"Aptera's desire to build a light and aerodynamically efficient — albeit unusual looking — car made sense".
But although electric cars are improving all the time, the combustion engine remains the dominant technology – albeit in more efficient and less polluting versions than its predecessors.
Now there are signs that he sees the BBC, albeit a more efficient BBC that he is happy to squeeze, as a potentially important component of one-nation Toryism.
Jeffrey L. Bewkes, Time Warner's chairman and chief executive, first signaled his plans in 2011 to consolidate the company's operations in a modern, highly efficient, albeit less luxurious, tower by 2017, when many of the company's leases expire.
How to decide between spending 10 euros (about $12.50, at $1.25 to the euro) a day for a rental bike or 6.50 euros for a day pass for the city's efficient (albeit indoor) rails, trams and buses?
