# Unable to Calibrate ESC (Remove Battery Error Despite not Battery Connected)

**URL:** <https://discuss.px4.io/t/unable-to-calibrate-esc-remove-battery-error-despite-not-battery-connected/37588>\
**Category:** QGroundControl\
**Created:** [April 1, 2024, 8:47pm UTC](https://discuss.px4.io/t/unable-to-calibrate-esc-remove-battery-error-despite-not-battery-connected/37588 "2024-04-01T20:47:29Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Phu\_Luong](https://discuss.px4.io/user_avatar/discuss.px4.io/phu_luong/32/16010_2.png) [@Phu\_Luong](https://discuss.px4.io/u/Phu_Luong)\
**Post date:** [April 1, 2024, 8:47pm UTC](https://discuss.px4.io/t/unable-to-calibrate-esc-remove-battery-error-despite-not-battery-connected/37588/1 "2024-04-01T20:47:29Z")

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I am attempting to calibrate the esc through the power tab on the QGC, but it kept prompting an error telling me to remove the battery despite there is no battery connected to the Pixhawk. What is connected to the Pixhawk is a receiver, the esc wires, and a USB connecting my pixhawk to my laptop.  
Any ideas what prompting this error?

 ![image](https://discuss.px4.io/uploads/default/original/3X/e/1/e10fd414a6c312ac749f2870746deeefc5f35831.jpeg)

Thank you for any feedback!

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**Author:** ![terrymao886](https://discuss.px4.io/user_avatar/discuss.px4.io/terrymao886/32/7379_2.png) [@terrymao886](https://discuss.px4.io/u/terrymao886)\
**Post date:** [April 5, 2024, 11:56am UTC](https://discuss.px4.io/t/unable-to-calibrate-esc-remove-battery-error-despite-not-battery-connected/37588/2 "2024-04-05T11:56:14Z")

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Hi,  
Basically, you must connect the power module, and do not connect the battery. Instead, wait for the notification from the QGC system, and then connect the battery to the power module, so that you can complete the ESC calibration process. By the way, if you use DShot communication protocol, then there is no need to perform ESC correction.

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**Author:** ![AcidBurnSB](https://discuss.px4.io/user_avatar/discuss.px4.io/acidburnsb/32/18228_2.png) [@AcidBurnSB](https://discuss.px4.io/u/AcidBurnSB)\
**Post date:** [January 12, 2025, 8:47am UTC](https://discuss.px4.io/t/unable-to-calibrate-esc-remove-battery-error-despite-not-battery-connected/37588/3 "2025-01-12T08:47:15Z")

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Same problem on Pixhawk 6X Baseboard v2B, Px4 FW: 1.15.2, just pure FC powered only from USB giving same error, already try on assembled drone, but no luck at all… how to solve this problem?  
my drone:  
Skydroid H30 + R30  
PM08 DroneCAN 200W  
Pixhawk 6X Baseboard v2B  
3DR Radio V5  
Hobbywing xRotor X8 100kv x 4  
12S 35000 mAh