Here is a link to a brand new aftermarket replacement battery that includes the needed tools and has a 1 year replacement warranty!

Battery for Samsung Galaxy Gear S

Thank you for the guide as it is very helpful! Here is a replacement battery for the Amazon Tap:

Amazon Tap Replacement Battery

It even comes with the necessary tools to complete the repair.

The replacement battery for the Fitbit Blaze can be found here:

Fitbit Blaze Battery

It also includes the tools needed (except the soldering iron) for this repair.

The replacement battery for the Fitbit Surge can be found here:

Fitbit Surge Battery

It also includes all of the tools (except soldering iron) needed for the repair.

If anyone is looking for the replacement battery for the Approach S2 it can be found here:

Replacement Battery for Garmin Approach S2

It also included the T5 Torx and Opening Tools that are needed.

This is an awesome step by step guide detailing each step along the way for battery replacement. The only discrepancy that I saw is that it says at the top of the guide that a T6 torx is a necessary tool to replace the battery when only a T5 torx is needed for this job. There is a 4000mAh replacement battery available for under $20 here: http://www.mpfproducts.com/bna-b0002-bat... for those interested. It even comes with all of the necessary installation tools.

Thank you for the detailed repair guide! Here is a site with a great price on a brand new replacement battery (Under $20):

http://www.mpfproducts.com/battery-for-s...

The repair only takes about 20 minutes. Thanks!