Camera USB power supply and battery compatibility: Check the camera manual before connecting an external power source

First distinguish between "powering the camera" and "charging the battery"

Behavior after a USB connection is determined by camera model, power delivery settings, battery status, and power source combination; not all functionality can be inferred from the USB-C or USB-PD designation. The Sony FX5 manual states that an external USB power supply can provide power during shooting/playback, but the camera will not charge the internal battery at the same time when it is turned on; the battery may still provide supplementary power under certain conditions. Check the power icon and description in the menu of the corresponding model to confirm the shooting power supply and battery charging capabilities respectively. 〔G-USB-01〕

Check the power supply and wire conditions according to the model

Taking the Sony FX5 as an example, its instructions require a USB-PD power output of at least 27 W (9 V / 3 A) and a USB-C cable that meets the power specifications, and it is recommended to insert a battery with sufficient power first; power may still be supplied below this output, but battery consumption may increase. This condition is for FX5 and cannot be directly applied to other models. The Canon EOS R6 manual states that the Canon PD-E1 can be used to charge the LP-E6P, LP-E6NH or LP-E6N, and the camera can also be powered by the adapter; the manual clearly states that the LP-E6 cannot be charged in this way, and it cannot be inferred whether the LP-E6 can power the camera in this combination. [G-USB-02] Before purchasing or connecting, you should check the body, regional manual, battery model, power output level and cable requirements. [G-USB-01, G-USB-02]

Observe the power supply status and temperature when shooting

External power supply does not mean that the battery will stop consuming, nor does it guarantee that any power source can operate stably. The Sony FX5 manual reminds that the continuous recording time during USB power supply may be shortened due to the increase in internal temperature, the area near the interface may become hot, and not all external power supplies are guaranteed to be available. 〔G-USB-03〕Before shooting, do an actual duration test to check the power supply indication, remaining power and temperature of the fuselage; stop using it if there is abnormal heating, power outage or loose cables and follow the manufacturer's instructions. 〔G-USB-01〕

Don’t guess at electrical parameters when using fake batteries or external cables

Different fake batteries/DC couplers are designed for different models and battery compartments. The output voltage, polarity, protection circuit and cable layout should be based on the camera and accessory manufacturers' information. This guide has no evidence to support describing all fake batteries as dangerous, and does not recommend rewiring, disassembling or testing with unconfirmed power sources. Only use clearly compatible accessories, and keep cables from being stretched, squeezed, or in contact with moving parts; when using a rabbit cage cable clamp, install it according to the instructions of the cable clamp and the body, and do not apply clamping force that may damage the interface.

Brief check before and after connection

Shut down the phone first, then connect the power supply and cables according to the model manual, confirm the power supply menu settings and indicator icons; take a short test shot and play it back to check whether the power supply is normal, whether the battery continues to be consumed, whether the connectors are loose, and the body temperature. Don't treat a certain model's 27 W threshold, port selection, or menu steps as a universal requirement for all cameras.