t-beam battery & i2c changes

docs/hardware/supported/lora.mdx

@@ -101,7 +101,7 @@ values={[
 
 
 :::warning
-Some of these boards contained the wrong component in the LiPo battery charging circuit allowing the battery to be overcharged. While this does appear to have been fixed recently, please see the [warning](https://www.thethingsnetwork.org/community/berlin/post/warning-attention-users-of-ttgo21-v16-boards-labeled-t3_v16-on-pcb-battery-exploded-and-got-on-fire) on The Things Network for more information.
+Some of these boards contained the wrong component in the LiPo battery charging circuit allowing the battery to be overcharged. While this does appear to have been fixed, please see the [warning](https://www.thethingsnetwork.org/community/berlin/post/warning-attention-users-of-ttgo21-v16-boards-labeled-t3_v16-on-pcb-battery-exploded-and-got-on-fire) on The Things Network for more information.
 :::
 
 [<img src="/img/hardware/lora-v2.1-1.6.png" alt="LILYGO® TTGO Lora V2.1-1.6" style={{zoom:'25%'}} />](/img/hardware/lora-v2.1-1.6.png)

docs/hardware/supported/rak4631.mdx

@@ -35,7 +35,7 @@ values={[
 - 1x Core Module slot
 - 1x WisBlock IO Module slot
 - 4x WisBlock Sensor Module slots
-- I2C, UART, GPIOs and analog input accessible with solder contacts
+- I<sup>2</sup>C, UART, GPIOs and analog input accessible with solder contacts
 - Micro USB port for debugging and power
 
 
@@ -64,7 +64,7 @@ It may be possible to add a user button using the [13002 IO module](https://stor
 - Connector for 5v solar panel (max 5.5v)
 - 1x Core Module slot
 - 2x WisBlock Sensor Module slots
-- I2C, UART and BOOT headers accessible with solder contacts
+- I<sup>2</sup>C, UART and BOOT headers accessible with solder contacts
 - Micro USB port for debugging and power
 
 
@@ -99,7 +99,7 @@ This board should work with the RAK5005-O firmware, however this is currently un
 - 1x Core Module slot
 - 2x WisBlock IO Module slot
 - 6x WisBlock Sensor Module slots
-- I2C, SPI, UART, BOOT and GPIOs accessible with solder contacts
+- I<sup>2</sup>C, SPI, UART, BOOT and GPIOs accessible with solder contacts
 - USB-C port for debugging and power
 - Battery selector switch
 
@@ -125,7 +125,7 @@ This board should work with the RAK5005-O firmware, however this is currently un
 - 1x Core Module slot
 - 1x WisBlock IO Module slot
 - 4x WisBlock Sensor Module slots
-- I2C, UART, BOOT and GPIOs accessible with solder contacts
+- I<sup>2</sup>C, UART, BOOT and GPIOs accessible with solder contacts
 - USB-C port for debugging and power
 
 
@@ -232,7 +232,7 @@ The [RAK1921 OLED display](https://store.rakwireless.com/products/rak1921-oled-d
 
 - 0.96 inch OLED display
 - Resolution 128 x 64 pixels
-- I2C interface
+- I<sup>2</sup>C interface
 
 
 This item requires soldering.  
@@ -287,7 +287,7 @@ To add a GPS to the RAK5005-O base board, you need the [RAK1910 GPS sensor](http
 
 Further information on the RAK1910 can be found on the [RAK Documentation Center](https://docs.rakwireless.com/Product-Categories/WisBlock/RAK1910/Overview/#product-description).
 
-To add a GPS to the RAK19003 base board, you need the [RAK12500 GPS sensor](https://store.rakwireless.com/products/wisblock-gnss-location-module-rak12500). It is supported via I2C on slot B for firmware versions 1.49 and above.
+To add a GPS to the RAK19003 base board, you need the [RAK12500 GPS sensor](https://store.rakwireless.com/products/wisblock-gnss-location-module-rak12500). It is supported via I<sup>2</sup>C on slot B for firmware versions 1.49 and above.
 
 - uBlox Zoe-M8Q GNSS receiver
 - GPS, GLONASS, QZSS and BeiDou satelite support
@@ -307,7 +307,7 @@ Further information on the RAK18001 can be found on the [RAK Documentation Cente
 
 The [RAK13002 IO Module](https://store.rakwireless.com/collections/wisblock-interface/products/adapter-module-rak13002) can be used to, amongst other things, add a user button to the RAK base boards (excluding the RAK19003 Mini base board). It features a number of different interface options:
 
-- 2x I2C interfaces
+- 2x I<sup>2</sup>C interfaces
 - 2x UART interfaces
 - 1x SPI interface
 - Upto 6x GPIOs

docs/hardware/supported/tbeam.mdx

@@ -118,9 +118,13 @@ This is an earlier version of the T-Beam board, and due to changes in the design
 </TabItem>
 </Tabs>
 
+:::note
+All T-beam models have an 18650 size battery holder on the rear of the device. This is designed to the original specification of the 18650, and only fits unprotected flat top 18650 cells. Button top and protected cells are typically longer than 650mm, often approaching 700mm.
+:::
+
 ## Screen
 
-- 0.96 inch OLED i<sup>2</sup>c display
+- 0.96 inch OLED I<sup>2</sup>C display
 - [Purchase link](https://www.aliexpress.com/item/32922106384.html)