Introduction
Follow this guide to replace a dead or low-capacity battery for the Samsung Galaxy S7 Edge.
Before disassembling your phone, discharge the battery below 25%. A charged lithium-ion battery can catch fire and/or explode if accidentally punctured.
If your battery is swollen, take appropriate precautions. Do not heat your phone. If needed, you can use a dropper or syringe to inject isopropyl alcohol (90+%) around the edges of the back cover to weaken the adhesive. Swollen batteries can be very dangerous, so wear eye protection and exercise due caution, or take it to a professional if you're not sure how to proceed.
What you need
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Once the back panel is warm to the touch, apply a suction cup as close to the heated edge of the phone as you can while avoiding the curved edge.
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Lift on the suction cup and insert an opening pick under the rear glass.
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Once you have the pick firmly inserted into the glass, reheat and reapply the iOpener to soften the adhesive.
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Slide the opening pick up along the side of the phone, separating the adhesive.
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Leave the pick in place and grab a second pick as you proceed to the next step. Leaving the pick inserted can help prevent the glue you just separated from re-adhering.
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Repeat the previous heating and cutting procedure for the remaining three sides of the phone.
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Leave an opening pick on each side as you continue to the next to prevent the adhesive from resealing.
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Use tweezers to peel away any remaining adhesive from the phone's chassis. Then clean the adhesion areas with high concentration isopropyl alcohol (at least 90%) and a lint-free cloth to prep the surface for the new adhesive.
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Peel the adhesive backing off of the new rear glass, carefully line up one edge of the glass against the phone chassis, and firmly press the glass onto the phone.
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Use the small notch on the lower left of the upper antenna to pry it out of the phone.
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Remove the upper antenna.
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Prepare an iOpener and apply it directly to the battery.
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Alternatively, apply some isopropyl alcohol under each corner of the battery and allow it to penetrate for several minutes to help weaken the adhesive.
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