Stellaris 4.5.2 repeatable technologies

21 technologies in Stellaris 4.5.2 can be researched without end (levels = -1). Each level costs the base plus the per-level amount more than the last — for most, 50,000 + 5,000 per level — and gives the same bonus again.

Every repeatable

Technology	Area	Tier	Cost	Each level
Extraction Patterns	Engineering	—	50,000 +5,000/lvl	+5% Minerals Minerals from Jobs
Fortified Core Layers	Engineering	—	50,000 +5,000/lvl	+10% Defense Platform Hull Points
High-Density Munitions	Engineering	—	50,000 +5,000/lvl	+5% Kinetic Weapon Damage
L-Gate Insight	Engineering	—	2,000 +5,000/lvl	—
Loader Efficiency	Engineering	—	50,000 +5,000/lvl	+5% Kinetic Weapon Fire Rate
Matter Compression	Engineering	—	50,000 +5,000/lvl	+5% Armor Hit Points
Miniaturized Pre-Igniters	Engineering	—	50,000 +5,000/lvl	+5% Explosive Weapon Fire Rate
Synchronized Firing Patterns	Engineering	—	50,000 +5,000/lvl	+10% Defense Platform Damage
Thermodynamic Yield Control	Engineering	—	50,000 +5,000/lvl	+5% Explosive Weapon Damage
Applied Infinity Thesis	Physics	—	75,000 +70,000/lvl	—
Applied Superconductivity	Physics	—	50,000 +5,000/lvl	+5% Energy Credits Energy Credits from Jobs
Flash Coolant	Physics	—	50,000 +5,000/lvl	+5% Energy Weapon Fire Rate
Focusing Arrays	Physics	—	50,000 +5,000/lvl	+5% Energy Weapon Damage
Shield Harmonics	Physics	—	50,000 +5,000/lvl	+5% Shield Hit Points
Administrative Efficiency	Society	—	50,000 +5,000/lvl	+5% Monthly Unity
Aggressive Conditioning	Society	—	50,000 +5,000/lvl	+10% Army Damage
Cell Revitalization	Society	—	50,000 +5,000/lvl	+5 Leader Lifespan
Iterative Pilot Training	Society	—	50,000 +5,000/lvl	+10% Strike Craft Fire Rate
Nerve Dampeners	Society	—	50,000 +5,000/lvl	+10% Army Health
Synapse Interceptors	Society	—	50,000 +5,000/lvl	+10% Strike Craft Damage
Transgenic Crops	Society	—	50,000 +5,000/lvl	+5% Food Food from Jobs