If it uses a Lithium-Ion battery, it's covered. All voltage lines are included in the new warranty.
Effective October 1, 2015, Makita has changed the terms of its Limited Warranty to 3-Years for all Lithium-Ion tools, batteries, and chargers (some accessories are included as well).
As with most tool warranties, Makita points out that repairs, abuse, and other alterations made to the tool, battery, or charger negate the warranty.
Read the full-version of the warranty here.
For help in understanding tool warranties, check out our article, Warranty Wars: Performance, features, and price will always be first-choice deal-makers for tool buyers, but warranty coverage has become the latest competitive battleground among tool companies.