Updates research/thinkpad

research/thinkpad.md

@@ -155,6 +155,8 @@ Esta seção inclui modelos "homologados" e também em pesquisa.
 * [x230 no ThinkWiki](https://www.thinkwiki.org/wiki/Category:X230).
 * [Lenovo ThinkPad x230 - iFixit](https://www.ifixit.com/Device/Lenovo_Thinkpad_x230).
 * [Downloads](https://pcsupport.lenovo.com/br/en/products/laptops-and-netbooks/thinkpad-x-series-laptops/thinkpad-x230/downloads).
+* [Battery calibration issues (and tips for fixing): when battery starts to suddenly drop its level](https://www.reddit.com/r/thinkpad/comments/2fworf/battery_calibration_issues_and_tips_for_fixing/).
+  * Exemplo: deixar por uns dias rodando a cada inicialização: `tlp setcharge 99 100`.
 
 ### X250