Battery compatibility and specifications for the Steadicam Ultra 2

Gear

ZephyrCan I fly my Alexa or RED on a Zephyr?389

Master SeriesIs a used Master Series rig worth buying as a first big rig?191

BFDHow do I power my BFD receiver from my camera or sled?186

VoltCan I retrofit a Volt onto my existing sled or gimbal?168

ArtemisHow do I power my camera and accessories from an Artemis sled?166

MDRWhere can I mount my Preston MDR on my rig?143

ModulusIs there a Modulus option for HD wireless video?141

G-70Will my G-70 fit my vest, gimbal or sled?126

FI+ZCan I control iris and zoom wirelessly, not just focus?60

HU3Where can I get my HU3 repaired, refurbished or repainted?60

CineLiveHow do I pack and case my CineLive rig for transport?54

G-70XHow does the G-70X compare to Pro Titan, Xarm and other arms?46

Trinity 2Is Trinity 2 SUP 3.0 firmware safe to install or buggy?46

Ultra VestWhich vest should I choose for my body size, comfort and operator type?39

2009Batteries/Power forum

17 years old. Gear and prices may have changed since.

DisputedParticipants disagreed and reached no conclusion. Read the findings as positions, not as an answer.

The Ultra 2 is designed to use Power Cube batteries made by IDX specifically for Tiffen, which are not equivalent to standard Endura batteries despite similar watt-hour ratings.
Power Cube and Endura batteries differ in amperage delivery capacity, which can be more important than watt-hour rating for powering specific equipment.
The IDX Endura 10S HD battery offers similar performance specifications to the Power Cube with 6150mAh capacity and 110W maximum load.
The Endura 10S HD was introduced by IDX Europe in June of the prior year and may have regional availability differences.
The standard IDX Endura 10S offers 6300mAh with 69W maximum load, providing less current capacity than the Power Cube.
Anton Bauer produces a comparable high-current battery in the Dionic HC line with similar specifications to high-current power solutions.

The Endura 10S HD appears to be primarily or exclusively available in Europe according to the discussion.
Exact equivalence between Power Cube and Endura 10S HD remains uncertain, as the Power Cube was reportedly a joint venture with exclusive distribution through Tiffen.
Information about regional availability and product specifications comes from forum discussion rather than official documentation.