Professional lithium-ion battery with standardized twist-lock mounting system for cinema cameras by ARRI, RED, and Sony; 95–290 Wh capacity, up to 15 A continuous current.
Technical Details
V-Mount batteries are based on Lithium-Ion technology with a 4S cell configuration (4 cells at 3.6V in series). Standard dimensions are 150mm × 100mm × 50mm with a weight of 0.8-2.3kg depending on capacity. The mechanical interface consists of two precision-milled aluminum guide rails spaced 75mm apart and a spring-based twist-lock mechanism.
Modern V-Mount batteries integrate digital communication protocols via the five-pin connector: battery status, temperature monitoring, and cell balancing. High-draw variants achieve continuous discharge currents up to 15A (210W), peak currents up to 20A. D-Tap outputs (12V) and USB ports for auxiliary devices are standard.
History & Development
Anton/Bauer developed the V-Mount system in 1992 as a successor to their proprietary Snap-On batteries for Betacam cameras. Sony licensed the system in 1994 for the Digital Betacam series, which led to V-Mount becoming an industry standard.
In 2003, RED introduced the V-Mount system into digital cinema cameras (RED One), followed by ARRI (Alexa) and other manufacturers in 2008. The introduction of Lithium-Ion technology in 2005 tripled the energy density compared to NiMH predecessors. In 2015, Intelligent Battery protocols with precise remaining runtime indication became established.
Practical Use in Film
On "Mad Max: Fury Road" (2015), 290Wh V-Mount batteries enabled uninterrupted shooting with stabilized camera rigs during 8-hour driving sequences. "1917" (2019) utilized the system for Steadicam one-shot sequences with up to 15 minutes of runtime per battery.
V-Mount batteries primarily power cameras (ARRI Alexa, RED, Sony Venice), but also monitors, wireless systems, and LED panels via D-Tap distribution. Hot-swap capability ensures continuous operation through battery changes during recording. Typical runtimes: ARRI Alexa Mini (90min with 150Wh), RED Komodo (60min with 95Wh).
Comparison & Alternatives
V-Mount competes with Gold-Mount (Anton/Bauer, 3-point mounting) and BP-U/NP-F systems (Sony, smaller capacities). V-Mount dominates professional cinema cameras, while Gold-Mount is prevalent in broadcast equipment.
B-Mount batteries (ARRI, 2019) offer 24V voltage and 400Wh capacity for new camera generations like the ARRI Alexa 35, but remain limited to specific systems. CFexpress Type B batteries are establishing themselves in compact cameras but only achieve 50Wh capacities.