Operation; Functional Description - Makita BTC04 Instruction Manual

Portable battery checker
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  • ENGLISH, page 1
To prevent the Portable Battery Checker from
falling off the wall, secure the third screw at the
center of the upper edge of the Portable Battery
► Fig.9
Upon completion of the mounting work, be
absolutely sure to verify that the Portable Battery
Checker will not be disengaged from the screws
when the battery is removed.
A loose screw or screws may
cause the Portable Battery Checker to fall off the
wall. Check regularly whether any of the screws
have come loose.
Turning on the unit
Hold down the power button for few seconds. The initial
screen will be displayed. To turn off, hold down the
power button for few seconds again.
NOTE: When 2 minutes have elapsed with no
operations having been performed, the LCD backlight
will be extinguished to prevent the power of the dry
cells from being consumed. When an operation
is performed with the backlight extinguished, the
backlight will light up again.
NOTE: When 3 minutes have elapsed with no
operations having been performed, the power of the
Portable Battery Checker will turn off automatically.
This function does not work while power is supplied
to the Portable Battery Checker using a USB
Operations in the initial screen
Turn on the power of the Portable Battery Checker and,
with the battery used for diagnosis not yet installed
(with the initial screen (Fig.10) displayed), the following
checks and operations can be performed.
Checking the remaining charge of
the dry cells
► Fig.10: (9). Dry cell indicator
The scale units of the dry cell indicator diminish as the
remaining charge of the dry cells diminishes. When
the dry cells do not have much charge remaining, the
dry cell indicator will flash, so use this as a general
indication as to when to replace the dry cells.
NOTE: When supplying the power via USB cable, dry
cell indication turns to be
Adjusting the contrast of the LCD
► Fig.11
The contrast (display brightness difference) can be
adjusted using the forward and backward buttons.
Adjust the contrast to a level that makes it easy to see
what is displayed.


Battery diagnosis procedure
Hold down the power button. The initial screen is
displayed when the Portable Battery Checker is
turned on.
► Fig.10
Install the battery which is to be diagnosed. The
screen changes, and battery diagnosis starts
► Fig.12
NOTE: Communication with the battery is initiated
in order to diagnose the battery. Communication is
not possible with batteries having certain kinds of
problems, in which case the display may not switch to
the screen Fig.12.
When diagnosis is completed, the diagnosis
results are displayed. With regard to interpreting
the diagnosis results, please refer to "How to
interpret the diagnosis results."
NOTE: Normally, a battery diagnosis is completed in
3 to 5 seconds or so. If the diagnosis result screen
fails to appear even after 10 or more seconds,
remove the battery. This is a situation where the
Portable Battery Checker cannot diagnose the battery
because of the nature of the problem with the battery.
After checking the diagnosis results, remove the
battery. The initial screen is restored.
Upon completion of use, hold down the power
button to turn the power off.
How to interpret the diagnosis
The diagnosis results are displayed on 4 separate
screens. Select these screens by operating the forward
and backward buttons.
► Fig.13: (10). Number of charging times
The number of times a battery has been charged to
date is displayed on this screen.
► Fig.13: (11). Remaining capacity
The remaining capacity of the battery is indicated using
a bar graph display. When the bar extends up to the far
right end, it means that the battery is fully charged.

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