K&F Concept NP-F550 Battery (3500mAh)

The smaller-form NP-F. Four of these in the kit at 3,500 mAh each, roughly 2.3x the capacity of a genuine Sony NP-F550 (which is only 1,500 mAh). USB-C charging built into the body, LED indicator on top of the cell so the cable doesn't block it, and minimal self-discharge over weeks of storage. They power the Accsoon CineView Quad receiver (NP-F slot), Tentacle Sync timecode boxes, field monitors as backup, and any other accessory that takes an NP-F550 form factor. We rotate these for the critical-path accessories where actual capacity matters; the generic F550s ride along as spares. USB-C charging is the practical advantage, we keep them topped up off any wall brick, the van USB-C, or one of the Anker power banks. Charges in about 4-5 hours via USB-C (10W max input).