RadioMaster Ultra Battery Strap (2 Pack)

The RadioMaster Ultra battery straps deliver a tension-locked hold for securing flight packs to FPV racing and freestyle frames. Unlike static Kevlar or standard nylon alternatives, the Ultra series relies on a heavy-duty elastic hook-and-loop construction that stretches over the LiPo, ensuring the battery remains tightly compressed against the silicone pad during high-G manoeuvres or hard impacts.

Key features

• Active tensioning: The elastic material stretches during installation, applying continuous downward clamping force to prevent lateral pack slippage.
• Woven hook-and-loop: Delivers high-shear grip to prevent the strap from tearing open and ejecting the battery during hard crashes.
• Dual-strap ready: Supplied as a pair to securely anchor heavier 4S–6S packs on 5-inch, 7-inch, or heavy-lift builds requiring two mounting points.

Because the strap stretches, it automatically compensates for battery pad compression and minor variations in pack dimensions without requiring manual readjustment between flights.