To replace the battery for Worx WA3551.1 WG169 WX372 WX166 WX372 WX390, locate the orange release button, press it down, and slide the battery out of the tool. Then, slide the new battery along the rails until it clicks into place.
Step-by-Step Replacement Guide
1.Locate the release button: Find the orange button on the battery pack or the tool housing, usually where the battery slides in.
2.Press and hold the button: Push the orange button down and hold it to disengage the locking mechanism.
3.Remove the old battery: While holding the button, pull the battery away from the tool. On some tools, you pull it up; on others, you slide it out sideways.
4.Insert the new battery: Align the new Worx WA3551.1 20V lithium-ion battery with the guiding rails or slot on the tool.
5.Secure the battery: Slide the new battery into the housing until you hear a click, which indicates it is properly seated and locked in place. The battery must be fully charged before its first use.