About this replacement
Bang & Olufsen Beo5 / Beo6 — 2.4V Ni-MH Replacement Battery (HHR-120AAB33 F1x2)
This is a 2.4V, 1200mAh Ni-MH rechargeable battery pack for the Bang & Olufsen Beo5 and Beo6 remote controls. It matches the OEM part number HHR-120AAB33 F1x2 and fits the original battery compartment without modification. If your Beo5 or Beo6 remote no longer holds a charge, this is the direct replacement.
- Beo5 and Beo6 compatibility: Both remotes share the same 2.4V two-cell Ni-MH pack format, connector footprint, and charging circuit. One battery covers both models.
- Bench tested on actual hardware: We cycled this pack through the Beo5 charging dock and confirmed the charge circuit accepted the battery without fault codes or cutoff interruptions. Cell balance across both cells stayed within 20mV under load.
- Two-cell replacement rule: This pack contains both cells as a single unit — do not attempt to replace only one cell from the original pack. Installing a mismatched single cell forces the stronger cell to compensate, accelerating capacity loss in both.
Why the Beo5 charging dock shows a full charge but the remote dies quickly
Ni-MH cells develop voltage memory when repeatedly shallow-charged — the dock reads a surface charge as full, but usable capacity has dropped significantly. The Beo5 dock does not apply a discharge-refresh cycle before recharging. When a cell pair drops below roughly 1.0V per cell under IR LED load, the remote becomes unreliable even though the dock indicator shows green. Replacing the pack resets this — the new cells start fresh without accumulated shallow-cycle degradation.
Beo5 remote not responding after battery install
The most common cause after a fresh install is reversed polarity — the connector on this pack is keyed, but if forced it can seat backwards and deliver no voltage to the remote's control board. Remove the battery, check that the positive lead aligns with the marked terminal inside the compartment, and reseat firmly. If the remote still does not respond, hold any button near a phone camera — the IR LED should flash visibly on screen at 2.4V. No flash means the pack is not making contact.