Compatibility answer

Will the Rad Safe Shield Advanced External Battery (15 Ah) work with the Rad Power Bikes RadRunner Plus (original, pre-MY2025)?

Yes. Both use Rad Power Bikes external (down-tube) battery - Safe Shield Advanced External 13 Ah / 15 Ah.

Both records are reviewed against the manufacturers' sources; sources last checked 2026-10-14. Informational only: confirm with the manufacturer before buying.

Why

  • ✓ Both use Rad Power Bikes external (down-tube) battery - Safe Shield Advanced External 13 Ah / 15 Ah.

Good to know

  • Rad lists as NOT compatible with the external Safe Shield packs: RadCity Step-Thru 3, RadCity High-Step 4, and Rad models with a semi-integrated battery; the 15 Ah pack also excludes RadMini 2 Step-Thru and RadRover 1 Step-Thru, and the 13 Ah pack excludes Rad models made before 2019.
  • The Safe Shield Basic External 10 Ah is NOT in this interface: Rad lists it as incompatible with RadWagon 5 and RadRunner Plus (MY2025) and recommends it mainly for the RadMission.
  • CPSC warning (Nov 24, 2025): stop using Rad lithium-ion batteries model RP-1304, RAD-S1304Y and HL-RP-S1304, sold with RadWagon 4, RadCity HS 4, RadRover High Step 5, RadCity Step Thru 3, RadRover Step Thru 1, RadRunner 1/2, RadRunner Plus and RadExpand 5; the warning states Safe Shield and semi-integrated batteries are not subject to it.
  • Rad: Safe Shield batteries 'are compatible only with our updated Rad charger' - 'Do not use with older Rad Power Bikes chargers or any third-party or aftermarket chargers.'
  • Rad: 'Not for use on non-Rad Power Bikes branded ebikes.'
  • Safety: use only batteries and chargers the drive-system maker approves. Lithium batteries that don't match can overheat.

Sources

Check your exact setup

Other parts in the cart, current configuration (installed memory, fan brackets) and adapters can change the answer.

Check a whole cart

Also checked with the Rad Power Bikes RadRunner Plus (original, pre-MY2025)

Everything checked with it

AI assistants and developers: the same answer, with a signed receipt, from check_compatibility at https://tetheredtrust.com/mcp or POST https://tetheredtrust.com/v1/check with existing_id: "rad-radrunner-plus", candidate_id: "rad-safe-shield-advanced-external-15ah".