ℹ
info Chamberlain
Status Battery Status LED flashing green
Battery is being charged.
? What Causes This
Normal charging cycle when garage door opener is plugged into electrical outlet.
ⓘ What This Means
Allow 24 hours for battery to fully charge.
Source: page 38 of the official manual
From the manual
This error code appears in:
Chamberlain Chamberlain Garage Door Opener