Introduction
Prerequisite only for removing the battery.
What you need
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Use a spudger to disconnect the battery by prying its connector straight up from the motherboard.
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If available, apply some high concentration (>90%) 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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Alternatively, apply a freshly heated iOpener to the back of the phone directly behind the battery for two minutes to help soften the adhesive. Re-heat and reapply the iOpener as necessary.
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Insert several opening picks or a plastic card along the outer edge of the battery.
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Apply steady, even pressure to slowly lever the battery up and out of the phone.
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Before installing your new battery, peel up all the old adhesive and remove it from the phone.
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For best results, clean the area underneath the battery with isopropyl alcohol and a lint-free cloth or coffee filter. This helps prep the surface so the new battery will adhere more strongly.
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Tool used on this step:Tesa 61395 Tape$5.99
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Place several strips of thin double-sided adhesive tape, either from a pre-cut adhesive card or from a roll of Tesa 61395, into the battery well, and press them firmly into place.
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Peel off the remaining film liners to expose the adhesive before pressing your new battery into place.
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Carefully position the battery and press it firmly and evenly into the phone.
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Connect the battery to the motherboard, and install the lower cover, including its six T3 Torx screws.
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