The battery compartment is located on the back of the MX40, accessible by
opening the compartment door from the bottom. It accommodates three
AA 1.5V Alkaline batteries or the Philips Rechargeable Lithium-ion battery.
Only these batteries should be used.
Note— Lithium-ion batteries should be fully charged prior to first use.
Important— Do not use other rechargeable batteries. Use of this type of
battery will adversely affect:
Battery gauge performance
Battery low warnings
Battery life performance
Insert batteries into the MX40 using the following
Open the battery compartment by lifting up on both bottom sides of the
Insert the AA battery tray if not already present.
Insert three AA 1.5V Alkaline batteries, matching the polarity with the
+/- indications inside the compartment.
Note—all batteries are inserted with the + polarity in the same direction.