Let’s do a deep-dive into how Makita can have a 40V Max battery in an 18V form factor.
BL4020 - Battery XGT® 2,0 Ah
The Makita 18V LXT Lithium-Ion battery charges faster and works longer than standard lithium-ion batteries, giving you and your cordless tools unmatched performance and productivity to take on the most demanding applications. The Makita 5.0Ah battery has a category-leading charge time of only 45 minutes, so it spends more time working and less time sitting on the charger. Compatibility.
Makita - BL1850B 18V LXT Lithium-Ion 5.0Ah Battery
191K01-6 - PowerPack XGT®
40V max XGT® Brushless Cordless 4‑Pc. Combo Kit (2.5Ah/4.0Ah)
Makita expands XGT '40V' range - Turf Matters
Makita XGT 40V and 80V Power Tools - What You Should Know
GEC01, The 80V Max XGT Brushless 14-in. Power Cutter From: Makita USA, Inc.
Makita launches its largest capacity battery to date - Professional Electrician
40V max XGT® Brushless Cordless 4‑Pc. Combo Kit (2.5Ah/4.0Ah)
Makita Takes Cordless Beyond Limits With Launch Of XGT® System
Makita GCV05T1X 40V Max XGT 0.5 Gallon Cordless Backpack Vacuum Kit with HEPA Filtration 5.0 Ah