diff --git a/README.md b/README.md
index 085aa81..ffd5bea 100644
--- a/README.md
+++ b/README.md
@@ -39,7 +39,7 @@ Version 0 demo video: https://youtu.be/8GzzIQ3C6DQ.
 
 <a href="https://youtu.be/8GzzIQ3C6DQ"><img width=500 src="https://i3.ytimg.com/vi/8GzzIQ3C6DQ/maxresdefault.jpg"></a>
 
-Usage in education (RoboCamp): https://youtu.be/Wd3yaorjTx0.
+Usage in education (RoboCamp 2025): https://youtu.be/Wd3yaorjTx0.
 
 <a href="https://youtu.be/Wd3yaorjTx0"><img width=500 src="https://i3.ytimg.com/vi/Wd3yaorjTx0/sddefault.jpg"></a>
 
@@ -92,7 +92,7 @@ Additional articles:
 |Propeller|55 mm or 65 mm|<img src="docs/img/prop.jpg" width=100>|4|
 |MOSFET (transistor)|UMW 100N03A or [analog](https://t.me/opensourcequadcopter/33).<br>Warning: don't use KIA 100N03A or other manufacturers, they might not work!|<img src="docs/img/100n03a.jpg" width=100>|4|
 |Pull-down resistor<br>Voltage measurement resistor|10 kΩ|<img src="docs/img/resistor10k.jpg" width=100>|6|
-|3.7V Li-Po battery|LW 952540 (or any compatible by the size).<br>Make sure the battery has enough discharge rate — 25C or more!|<img src="docs/img/battery.jpg" width=100>|1|
+|3.7V Li-Po battery|LW 952540 (or any compatible by the size).<br>Make sure the battery has enough discharge rate and capacity — 25C with 1000 mAh or more is recommended!|<img src="docs/img/battery.jpg" width=100>|1|
 |Battery connector cable|MX2.0 2P female|<img src="docs/img/mx.png" width=100>|1|
 |Li-Po Battery charger|Any|<img src="docs/img/charger.jpg" width=100>|1|
 |Screws for IMU board mounting|M3x5|<img src="docs/img/screw-m3.jpg" width=100>|2|
diff --git a/docs/theme/index.hbs b/docs/theme/index.hbs
index 7e270d9..da9dcaf 100644
--- a/docs/theme/index.hbs
+++ b/docs/theme/index.hbs
@@ -118,7 +118,7 @@
                     <a href="https://t.me/opensourcequadcopter" class="telegram">Telegram-канал</a>
                     💰 Поддержать проект:
                     <iframe style="margin-top: 0.4em;" src="https://yoomoney.ru/quickpay/fundraise/button?billNumber=16U9OH2S4IT.241205&" width="330" height="50" frameborder="0" allowtransparency="true" scrolling="no"></iframe>​
-                    &copy; 2025 Олег Калачев
+                    &copy; 2026 Олег Калачев
                 </footer>
             </mdbook-sidebar-scrollbox>
             <noscript>