Greetings Leia, thanks for taking the time to ask us your questions about the Samsung Galaxy Tab S9. Whether you're using a phone, tablet, smart watch, or earbuds, all Galaxy devices have a set temperature range, where they operate at their best. While they may feel warm under certain conditions, like charging, this does not affect the device's lifespan or performance. However, if your devices get too warm, it could cause some issues. Although your Galaxy devices may get warm sometimes, they have built-in safeguards to alert you and protect themselves if their temperature exceeds the normal operating range. Check out, "Keep your Galaxy device at its normal operating temperature" to learn about the factors that may affect your device's temperature. Also check out, "Apps are draining battery on Galaxy phone or tablet," "Galaxy Battery - Optimization," and "Get the most out of your Galaxy phone or tablet battery" to help resolve what you may be experiencing with your battery life. Instead of purchasing a new tablet, you can purchase a replacement for your missing S Pen. The S Pen Pro Edition and the S Pen Creator Edition are compatible with your device. If you would like to learn more, check out "Learn about the different Samsung S Pens." If you have any questions for us afterward or if you would like any further assistance, please do not hesitate to reach out to Support. Thanks for choosing Samsung! - Debra