The Yaesu FTX-1 Optima includes the SBR-52LI Li-ion battery for portable field use.

Battery Specifications

This is a large-capacity 6400mAh Li-ion battery pack (10.8V), explicitly designed for undocked field operations with the FTX-1 Field Head. It powers the transceiver's QRP HF/6m/2m/70cm all-mode capabilities during portable activations, like POTA or SOTA outings.

The Optima package bundles it alongside the SPA-1 100W amplifier for base use, making it a versatile hybrid rig —dock for home station power, undock for trailside DXing.

Field Use Context

  • Capacity edge : 6400mAh supports extended sessions (e.g., 10W QRP for hours, depending on duty cycle and bands).
  • Design perks : Compact, swappable, with options like cooling fans or extended cables for rugged setups.
  • Real-world vibe : Early 2025 adopters on YouTube and shops note it shines for field ops post-U.S. launch, with Europe getting refined firmware by late '25.

"FTX-1 Optima is supplied... with a detachable 100W RF power amplifier - SPA-1 for a Base Station *in addition to the SBR-52LI Li-ion battery for field operation."

Bottom TL;DR : SBR-52LI (6400mAh Li-ion) is the go-to battery—perfect for portable field adventures with Yaesu FTX-1 Optima.

Information gathered from public forums or data available on the internet and portrayed here.