Update README.md

README.md

@@ -63,10 +63,9 @@ There are 2 different apps in these repositories located in different branches a
 
 ## Hardware Buying Guide (<$20 total)
 
-- Board: Seeed Studio XIAO nRF52840 Sense | $15 on [Seedstudio](https://www.seeedstudio.com/Seeed-XIAO-BLE-Sense-nRF52840-p-5253.html) and $24 on [Amazon](https://www.amazon.com/Seeed-Studio-XIAO-nRF52840-Microcontroller/dp/B09T94SZ8K/ref=sr_1_2?dib=eyJ2IjoiMSJ9.i8MUToWd9xYaOg5PHVw2pyxS9i6YZMcZTG4DVV3lwRRKxy64YMOtO-LDhe63d90cDl7xEr3CeA2zN4P5c2G7nGgJl99_6yCVplKsFqtxJyfSQuCMUyZON27nWRtnp-uW1wazpgUV0lN5ds7FKkYz5HTI8bZoLnK2OnFuUet_S4Wsr20oABAovtdI2xrjVYyLaiqLzxrpZyveKDRk_TDpht0rztApuX-YrBb00GDQyFs.sZLkUFW18C8b3EnZpgVKEomXioMKdSLq0F17PikAwc0&dib_tag=se&keywords=nrf52840&qid=1711331537&sr=8-2&th=1) and also [link for europe ](https://amzn.eu/d/3eG6gaA) and [India](https://robu.in/product/seeed-studio-xiao-ble-nrf52840/) | <$15/unit
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-- Rechargeable Coin Battery| [$13 for 5 units on Amazon](https://www.amazon.com/EEMB-LIR2450-Rechargeable-Lithium-ion-Batteries/dp/B096LRQWJS/ref=sr_1_2_sspa?c=ts&dib=eyJ2IjoiMSJ9.iB9wqIOnOFHp9bY1qXkvWnYNLa8HARTAYvJVpVbQw-qguwquzLFLUkNGPkwizKa3c7DF0VJuhO9BTT_NvIx7fCvPalViw9V0BMf0AJP70zR5RR3IxfqXO0P7cEVGBldfucYyftWN05Wd58HGdIFSFyDy1ov1-10FzULlR4uIAAkFzUiSMCHzRcC_JSDym8cVGWr6lnYd6X_sn3yLDRaWdzPvoonRihopnSSN_4YS8FB7htsM_hVHhxfkq7VSPEN9Gha0j2_g2N1yFz3c_bHUywG7FTp1GVSX3BWb9LAhWbY.DTlkyIjSmkY3V14SNbhsNkghKuK2l-hoeHuKQYqgqbI&dib_tag=se&keywords=Coin+%26+Button+Cell+Batteries&qid=1711331648&refinements=p_n_feature_twenty_browse-bin%3A10063714011&s=hpc&sr=1-2-spons&ts_id=389581011&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY&psc=1) and also [link for europe ](https://amzn.eu/d/50zZymw)but you only need one | $2.5/unit
+- Board: Seeed Studio XIAO nRF52840 Sense | $15 on [Seedstudio](https://www.seeedstudio.com/Seeed-XIAO-BLE-Sense-nRF52840-p-5253.html) and $24 on [Amazon](https://amzn.to/3TZD1pO) and also [link for europe ](https://amzn.eu/d/3eG6gaA) and [India](https://robu.in/product/seeed-studio-xiao-ble-nrf52840/) | <$15/unit
 
+- Rechargeable Battery on [Amazon](https://amzn.to/3TXlE9f) $7  
 - Slider switch | $7 for 30+ units [on Amazon](https://www.amazon.com/Tnuocke-Vertical-Position-Latching-SS12F15-G5/dp/B099N3HFPG/ref=sr_1_2?dib=eyJ2IjoiMSJ9.vWYaZHNA7Z38_YnK7oxLKHvVPX-koqNn5CYGqZXKURCQso_zrAwckot4_h8c77Kgy2-m8FcrQymrZff0rlZIGdECJFA5Rwc5EQObrZ5wDb9zjnwVjonhSZfHlyM-KkJKO4_E6mKcC_I0vZg2vS1PBPkNSAXj9H9pTVK3D2iVtuoMNsxvAEwrYUPx3gYOiIjMOzJYoj8aHPmy2W1R4bWcPWp8IvhbO1GO29TT0jVE97U.ZavNMHkM9KYGMLSB_3DREpSJjhQ16_cjqOpo7aPAfHY&dib_tag=se&keywords=slider%2Bswitch&qid=1711332053&sr=8-2&th=1) and also [link for europe ](https://amzn.eu/d/9U0gjPB) but you only need one | <$1/unit
 
 - Wires. I didn't try [these ones ](https://www.amazon.com/dp/B09X4629C1)but they should work