Beatr Dna 75c, single battery mod, fits 20700 and some 21700. Buttons and screen holder included.
You need: All the parts are available at www.modmaker.co.uk
DNA 75c board and screen
ModMaker Micro 510 With 22mm Washer or FatDaddy ultimate 22mm
ModMaker 21700 Battery Tube
3 Screws, M1.7 x 5mm
16ga silicone wire