Professional equipment specifications can change. Data below was checked against the linked manufacturer source on 2026-07-25. ComparePilot does not provide medical or infection-treatment advice.
Tattoo Power
Critical Connect V2 Universal Battery
Critical's Connect V2 Universal Battery combines an OLED display, Bluetooth 5.0, configurable jumpstart, magnetic connection, and included RCA converter with up to 10+ hours of stated runtime depending on setup.
$269.99
Verified Jul 26 · Critical TattooDisplay: OLEDConnectivity: Bluetooth 5.0
Best for: Artists who want to convert compatible rotary machines to a wireless Critical Connect workflow
Compatibility94
Battery96
Control95
Workflow95
Value84
Advantages
Pros
- Works with many rotary machines through magnetic connection and RCA converter
- OLED display, Bluetooth 5.0, and Critical Connect foot-switch support
- Up to 10+ hours stated runtime depending on machine and voltage
Tradeoffs
Cons
- Adds weight and length to the rear of the machine
- Fit and balance depend on the host machine
- Runtime varies substantially with voltage and cartridge load
Machine and workflow snapshot
Key specifications
Display
OLED
Connectivity
Bluetooth 5.0
Runtime
Up to 10+ hours depending on setup
Weight
2.0 oz standard / 1.4 oz Shorty
Length
2.2 in standard
Connection
Magnetic with included RCA converter
Jumpstart
Customizable 6-10V assist
Modes
Continuous and Momentary