The project focuses on the development of multilayer Laue lenses (MLLs) for ID13. Previous experiments have already shown focal spot sizes down to ~23 nm with diffraction efficiencies up to about 29 %. The main instrumental goal of this LTP is the development of two types of MLL optics, namely (i) “very long-distance” with a focal length of up to ~150 mm, a working distance of >100 mm (@ 12 keV) and an optics aperture of up to ~ 200 µm × 200 µm and (ii) “a new high resolution” lens pair with a focal spot size down to half of the present value, reaching ~10 nm. The MLLs will be used to perform (i) in-situ micromechanical tests on thin films and fibers using a dedicated indenter and (ii) in-operando electro-chemo-mechanical tests on solid state batteries (SSBs). For this purpose, the indenter from MI-1355 will be further developed by implementing new sample mounts, wedge and flat-punch tips and tensile option. Additionally, an adaptable in-operando cell to test SSBs will be designed.