Check out the video above or the step by step guide below for assistance with this repair

iFixit Apple Watch Series 4 Battery Replacement Guide

Here are some tools you may need to help you complete the repair.

Please note: A discounted simple toolset with the tools you need is available in a pop-up when you add this product to cart

• uFix iOpener Microwaveable Heated Bag Opening Tool
• iGadget Exacto Technician Knife with x5 blades
• iFlex Metal Flexible Opening Tool (display edge only)
• iGadget Plastic Triangle Opening Picks (set of 5)
• Y000 Metal Triwing Tri-Point 0.6mm Screwdriver Tool
• Nylon Antistatic Spudger Pry Tool
• Mechanic AK-15 King ESD Anti-Static Curved Tweezers
• iGadget Plastic Alcohol 200mL Bottle with Pump Top
• Apple Watch Series 4 40mm Force Touch gasket
• B7000 Multipurpose Liquid Repair Glue
• 1mm Tesa Tape 61395 Roll
• iGadget Universal Magnetic Work Project Mat with Marker (30cm x 25cm)

Here are some helpful tips to assist you in completing a safe repair on your device. If you are unsure of something or have any questions, please feel free to contact us either by phone (0508 IGADGET) or by email

• Drain the battery below 25% before you start on this repair. A charged lithium-ion battery can catch fire if it's punctured or damaged
• Power the watch off and take it off its charger before you open it
• Warm the display with the iOpener, then cut the adhesive with the knife no more than about 2mm in, or you can cut the Force Touch sensor. Use the iFlex on the display edge only, never near the battery
• The Force Touch gasket often sticks to the display rather than the case, so lift slowly with a pick to keep it whole. Open the display only to about 45 degrees: its cables are still connected underneath
• Track your screws on a magnetic mat and handle them with tweezers, so each tiny screw goes back in the right place
• Peel the black sticker off the metal plate over the battery connector, remove the 1.2mm Y000 screw and the plate, then lift the connector with a spudger before you touch anything else. The Force Touch cable covers one corner of the battery, so lift the battery from the other side
• Keep metal tools away from the battery, and never bend, crush or puncture it. Lift the old battery slowly with a plastic pick, keeping it shallow, as the display cables run underneath it
• Remove every bit of the old battery adhesive and clean the case with isopropyl alcohol. Peel the liner from the new battery's adhesive, press the battery into place and reconnect it, then check the watch powers on and charges before you seal it. If the pre-attached adhesive won't hold, use a small strip of 1mm Tesa tape
• Clean the old adhesive off the Force Touch gasket and the display with isopropyl alcohol. Lay thin strips of 1mm Tesa tape on the gasket (or fit a new gasket with adhesive if it split), or run a thin bead of B7000 glue around the case edge, then press the display down evenly while it sets
• If your watch doesn't turn on after the repair, force restart it: hold the side button and the Digital Crown together for at least 10 seconds, until the Apple logo appears