{"product_id":"portkeys-bd4-dummy-battery-power-adapter-dual-output-flexible-rig","title":"Portkeys BD4 Dummy Battery Power Adapter Dual Output - Flexible Rig","description":"\u003cp\u003eOur review of the Portkeys BD4 Dummy Battery Power Adapter finds it aimed squarely at camera operators who need a compact, rig-friendly way to power both an NP-F monitor and a V-Mount wireless video transmitter from a single source. The biggest reason to consider the BD4 is its pass-through power design that accepts either 15V USB-C PD or a 7~16.8V DC input and delivers separate outputs to a monitor and transmitter, reducing battery swaps and clutter on run-and-gun shoots.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual power outputs:\u003c\/strong\u003e Simultaneously powers an NP-F monitor and a V-Mount wireless transmitter so you can run both devices from one input source without extra batteries.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e7~16.8V pass-through:\u003c\/strong\u003e Accepts a wide voltage range via USB-C or barrel DC input to keep varied equipment running under different power conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUSB-C and DC compatibility:\u003c\/strong\u003e Supports 15V USB-C Power Delivery (PD 3.1) and 7~16.8V DC barrel input so PD power banks or D-Tap supplies can be used on location.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwitchable mounting:\u003c\/strong\u003e Repositionable design with a tool-free 1\/4' thumb screw allows quick conversion between vertical and horizontal mounting for cages and gimbals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRugged compact build:\u003c\/strong\u003e CNC-machined aluminum alloy with ABS inserts provides a lightweight yet durable housing that stands up to mobile use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated protection:\u003c\/strong\u003e Built-in safety circuitry guards against over-current, reverse polarity, and short circuits for safer hot-swapping on set.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe BD4 is best suited to indie filmmakers, run-and-gun shooters, and camera operators who need a tidy way to feed both a monitor and a wireless video transmitter from a single battery or USB-C PD bank. Its small weight and repositionable mount make it a good fit for cage-mounted setups and gimbals where space and balance matter.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include users who require integrated charging of internal batteries or models that rely exclusively on a single proprietary mount standard; the BD4 is a pass-through adapter designed to bridge power between external supplies and accessories, not a full replacement for high-capacity V-Mount battery solutions.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCompact, durable CNC-machined housing that keeps rig weight low while resisting wear.\u003c\/li\u003e\n\u003cli\u003eFlexible input options with USB-C PD 3.1 and DC barrel input, plus included D-Tap to DC cable for location batteries.\u003c\/li\u003e\n\u003cli\u003eTool-free vertical or horizontal mounting adapts quickly to cages and gimbals.\u003c\/li\u003e\n\u003cli\u003eSafety circuitry for over-current, reverse polarity, and short-circuit protection supports hot-swapping.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSome customers report mixed experience with the USB-C port functioning reliably, so verify compatibility with your PD source before critical shoots.\u003c\/li\u003e\n\u003cli\u003eAs a pass-through adapter it does not replace a dedicated high-capacity V-Mount battery for extended runtimes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eDummy battery power adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutputs\u003c\/td\u003e\n\u003ctd\u003eNP-F monitor and V-Mount wireless transmitter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput\u003c\/td\u003e\n\u003ctd\u003e15V USB-C PD 3.1 or 7~16.8V DC barrel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eSwitchable vertical or horizontal with 1\/4' thumb screw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eCNC-machined aluminum alloy with ABS inserts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection\u003c\/td\u003e\n\u003ctd\u003eOver-current, reverse polarity, short-circuit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e204 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Portkeys BD4 is a practical adapter for operators who want to power a monitor and wireless transmitter from a single USB-C or DC source without adding bulk. It offers useful mounting flexibility and solid protection circuits, making it good value for filmmakers who prioritize a compact, rig-friendly power solution, though users needing long V-Mount runtimes should still pair it with a dedicated battery system.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan the BD4 be powered by a USB-C power bank?\u003c\/strong\u003e\u003cbr\u003eYes, it supports 15V USB-C Power Delivery (PD 3.1), so compatible PD banks can be used as the input.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs a D-Tap cable included for rig batteries?\u003c\/strong\u003e\u003cbr\u003eYes, a D-Tap to DC input cable is included to connect D-Tap-equipped batteries.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it charge NP-F batteries?\u003c\/strong\u003e\u003cbr\u003eNo, the BD4 provides pass-through power to accessories; it is not designed to charge internal NP-F battery cells.\u003c\/p\u003e","brand":"Portkeys","offers":[{"title":"Default Title","offer_id":48646589481179,"sku":"B0F5PMVR6T","price":39.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61VS7LP1jwL._AC_SL1500.jpg?v=1778612154","url":"https:\/\/gearmusthave.com\/products\/portkeys-bd4-dummy-battery-power-adapter-dual-output-flexible-rig","provider":"GearMustHave","version":"1.0","type":"link"}