Battery Replacement - Panasonic KX-TCM418ALW Operating Instructions Manual

Battery Replacement
if ihe BATT LOW indicator flashes after being fully charged,
replace the battery with a new Panasonic P-P301 (KX-A36A) battery.
To prevent memory loss, replace within 5 minutes.
Remove the cover by
sliding it while pressing
the arrow.
Replace the battery, then
close the cover.
Be sure to charge the new
battery for about 3 hours.