Introduction
Go to step 1 ↓How to replace the battery of a Lenovo ThinkPad T420 laptop. The images and information in this guide were taken from this computer's service manual.
What you need
Fix Kit
This kit contains all the parts and tools needed to complete this guide.
Parts
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Unlock the battery latch and hold it it the unlocked position.
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Remove the battery pack in the direction shown by arrow.
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To replace the battery & reassemble your device, follow these instructions in reverse order.