Chinese company SWIT has released a series of USB-C dummy battery accessories aimed at simplifying on-location and mobile camera power setups. The product range includes models for Sony NP-FZ100 and Canon LP-E6 battery platforms, a dual-output NP-F dummy battery and a bi-directional USB-C to D-tap converter. These devices are intended to streamline power delivery using USB-C Power Delivery (PD) or D-tap inputs, offering an alternative to conventional battery-swapping workflows.

The accessories are designed for mirrorless cameras, DSLRs and compact cine cameras. By regulating voltage internally, each dummy battery maintains compatibility with a variety of USB-C sources, including PD power banks, AC adapters and V-mount batteries. SWIT’s implementation includes built-in trigger circuits that negotiate the correct PD voltage profile for each battery type, with regulated output levels—typically 7.2V or 8.4V at up to 3A—depending on the model.

The DB-FZ100 is tailored for Sony mirrorless cameras that use the NP-FZ100 battery, such as the FX3, FX30 and A7/A9 series. It converts USB-C PD to a regulated 8.4V/3A output. Similarly, the DB-E6P is compatible with Canon LP-E6 variants, supporting models such as the EOS R5, R6, 5D and 6D, along with Blackmagic Pocket Cinema Cameras and Z CAM bodies. It also delivers 8.4V at up to 3A.

For accessory powering, the DB-DF570 provides two NP-F-style outputs at 8.4V/8A and includes a 36W USB-C output: it can be powered by either USB-C or D-tap sources and features an LED display to show input voltage. The unit is designed for simultaneous use with devices like field monitors, transmitters or small LED lights.

The BC-PD100 is a bi-directional converter allowing power to flow either from a D-tap source to USB-C devices or from a USB-C PD source to charge D-tap-equipped batteries. It supports up to 100W USB-C output and includes a 1/4-inch mounting screw for attachment to rigs.