Uploaded June 2022 | Updated September 2026, 3 weeks ago
🔗 MrD-RC.com 🔗 patreon.com/MrD_RC
In this video we look at how to replace the real-time clock (RTC) battery in the FrSky Tandem transmitters. This video covers the X20, X20S, and X18. For the X20/S you will need PH1 and PH0 screwdrivers. For the X18, you only need a PH1.
The battery in both transmitters is the CR1220.
✈️ Contents ✈️
00:00 Introduction
00:50 Removing the back of the X20
03:26 - Moving the ISRM module out the way to access the battery
04:35 - Replacing the battery
05:25 - A couple of things of note inside the transmitter. How to rotate the gimbals
06:05 - Putting the X20 transmitter back together
10:59 Removing the back of the X18
13:12 - Replacing the RTC battery
13:41 - Gimbal spring tension adjusters and the ratchet and stiffness of the throttle
14:29 - Antennae orientation
15:07 - Putting the Tandem X18 back together
17:02 Conclusion
Thank you for watching this video. Time is precious, so I hope that you got some benefit from this video. If you have any questions, please leave a comment and I'll do my best to answer. Please try to keep questions relevant to the video in, as they may also help others who have the same question.
✈️ In this video ✈️
⚙️ FrSky X20S Tandem transmitter: bit.ly/MrD_3x6n6JL
⚙️ FrSky X18 Tandem transmitter: bit.ly/MrD_3LD7R1j
✈️ Help other RC pilots find this video ✈️
If you found the video useful, I'd appreciate a thumbs up. This will help YouTube share this video with other RC pilots who may find it helpful. If you would like to get more videos when they become available, please subscribe and click the notifications bell icon. If there are links above, they may be affiliate links. If you click them, it will help me and my channel at no additional cost to you.
✈️ Supporting me and other resources ✈️
🛩 There are more tutorials on my web site at https://www.MrD-RC.com.
🛩 You can also join like-minded people at the Fixed Wing RC Rebels group and INAV Fixed Wing Group on Facebook.
🛩 Join the channel's discord server at discord.gg/HMvrgZX6su
🛩 Liking the video, subscribing, and clicking the bell icon can help greatly. This shows YouTube that the video is helpful, so it will be shown to more people, who may have the problem dealt with here.
🛩 If you found my video useful, you can become a Patreon at patreon.com/MrD_RC
🛩 If you prefer, you could always buy me a Coffee at mrd-rc.com/go/ko-fi
🛩 I also have merch at mrd-rc.creator-spring.com This include branded items as well as general fixed wing RC apparel.
Thank you for your time, and don't forget to fly it like you stole it!
🔗 MrD-RC.com 🔗 patreon.com/MrD_RC
In this video we look at how to replace the real-time clock (RTC) battery in the FrSky Tandem transmitters. This video covers the X20, X20S, and X18. For the X20/S you will need PH1 and PH0 screwdrivers. For the X18, you only need a PH1.
The battery in both transmitters is the CR1220.
✈️ Contents ✈️
00:00 Introduction
00:50 Removing the back of the X20
03:26 - Moving the ISRM module out the way to access the battery
04:35 - Replacing the battery
05:25 - A couple of things of note inside the transmitter. How to rotate the gimbals
06:05 - Putting the X20 transmitter back together
10:59 Removing the back of the X18
13:12 - Replacing the RTC battery
13:41 - Gimbal spring tension adjusters and the ratchet and stiffness of the throttle
14:29 - Antennae orientation
15:07 - Putting the Tandem X18 back together
17:02 Conclusion
Thank you for watching this video. Time is precious, so I hope that you got some benefit from this video. If you have any questions, please leave a comment and I'll do my best to answer. Please try to keep questions relevant to the video in, as they may also help others who have the same question.
✈️ In this video ✈️
⚙️ FrSky X20S Tandem transmitter: bit.ly/MrD_3x6n6JL
⚙️ FrSky X18 Tandem transmitter: bit.ly/MrD_3LD7R1j
✈️ Help other RC pilots find this video ✈️
If you found the video useful, I'd appreciate a thumbs up. This will help YouTube share this video with other RC pilots who may find it helpful. If you would like to get more videos when they become available, please subscribe and click the notifications bell icon. If there are links above, they may be affiliate links. If you click them, it will help me and my channel at no additional cost to you.
✈️ Supporting me and other resources ✈️
🛩 There are more tutorials on my web site at https://www.MrD-RC.com.
🛩 You can also join like-minded people at the Fixed Wing RC Rebels group and INAV Fixed Wing Group on Facebook.
🛩 Join the channel's discord server at discord.gg/HMvrgZX6su
🛩 Liking the video, subscribing, and clicking the bell icon can help greatly. This shows YouTube that the video is helpful, so it will be shown to more people, who may have the problem dealt with here.
🛩 If you found my video useful, you can become a Patreon at patreon.com/MrD_RC
🛩 If you prefer, you could always buy me a Coffee at mrd-rc.com/go/ko-fi
🛩 I also have merch at mrd-rc.creator-spring.com This include branded items as well as general fixed wing RC apparel.
Thank you for your time, and don't forget to fly it like you stole it!
