Replacement of the W670SZQ1 BIOS Battery

Open the latch of the accumulator on the left side.

Open the battery latch on the right side.

Remove the accumulator by simultaneously holding the right-hand latch open.

Use the Philips screwdriver to remove the two screws at the bottom of the cover.

Lift the cover at the bottom right with the iFixit Opening Tool

Lift the cover at the bottom left with the iFixit Opening Tool

Finally, remove the cover to gain access to the most important components.

Be careful removing the BIOS battery from its holder.

Please do not throw the battery in the garbage. In Switzerland, the electrical shops are obliged to accept all batteries and accumulators for disposal.