Clarity Professional C4220 Replacement Battery 3.6V 800mAh

Clarity Professional C4220 / C4230 Series — 3.6V Ni-MH Replacement Battery (GP80AAAH3BXZ)

This 3.6V, 800mAh Ni-MH battery replaces the GP80AAAH3BXZ pack in the Clarity Professional C4220, C4230, and C4230HS cordless handsets. It matches the original voltage and cell format, so it seats and connects the same way as the factory pack. Capacity is rated at 2.88Wh — identical to the stock specification.

• C4220, C4230, and C4230HS compatibility: All three handsets share the same 3.6V three-cell NiMH pack format and use the same battery bay connector. The GP80AAAH3BXZ part number covers the full line — no hardware differences affect fit or BMS communication on these models.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on the C4220 platform. The base station accepted the battery without error flags, and the BMS held voltage within the expected NiMH charge curve throughout all test cycles.
• First-charge protocol for NiMH cordless packs: Place the handset in the base immediately after installing this battery and leave it for a full 16 hours before taking the first call. NiMH cells shipped in storage state need one slow, uninterrupted charge to initialise capacity — skipping this shortens usable talk time from the first cycle.

Talk time shorter than the original battery after replacement

NiMH cells don't deliver full rated capacity on the first cycle — they need three to five full charge and discharge cycles to reach the 800mAh spec. If talk time feels short after day one, that's normal cell behaviour, not a faulty battery. Each full cycle adds measurable capacity until the cells stabilise. Run the handset to low charge and return it to the base each day for the first week to complete the conditioning phase.

Base station showing no-charge light or error after battery swap

NiMH batteries sitting in warehouse storage lose voltage over time. Some Clarity base stations check incoming voltage before starting the charge cycle — if the pack reads too low, the base flags an error instead of charging. Remove the handset, wait 30 seconds, and re-seat it firmly so the contacts align. If the error persists, the pack needs a small surface charge first — some bases recover the pack if left seated for an hour without disturbing it. The base should show a solid charge indicator once the pack voltage climbs above the acceptance threshold, typically around 3.0V.