Medion MD9960 Cordless Phone Replacement Battery 3.6V 700mAh

Medion MD9960 Series — 3.6V Ni-MH Replacement Battery (17NO09T180)

This is a 3.6V, 700mAh Ni-MH replacement battery for the Medion MD9960 cordless DECT handset and closely related models. It replaces OEM part number 17NO09T180 and fits the MD9960, MD9965, MD9966, and MD9983 handsets. All four models share the same battery bay dimensions, connector, and voltage rail.

• MD9960, MD9965, MD9966, MD9983 fit: These handsets use the same 3.6V single-cell NiMH pack with identical physical dimensions (44.74 × 20.77 × 10.50mm) and connector pinout. No modification is needed — the pack seats and contacts the same way across the range.
• Bench tested on actual hardware: We ran this pack through full charge and discharge cycles on the bench. The BMS handshake with the base station completed without error, and the cell voltage held steady across normal standby and active RF transmit load.
• First charge on NiMH handset batteries: After installing, place the handset in the base station and leave it for a full 16 hours before first use. NiMH cells in cordless phones require this slow initial charge to reach rated capacity — a shorter first charge will leave the cells underformed and talk time will fall short of spec for several cycles.

Base station showing no charge light after fitting new NiMH pack

NiMH cells can drop to very low voltages during storage. Many Medion base stations use a threshold detection circuit that expects to see at least a minimum cell voltage before enabling the charge current. If the pack arrives deeply discharged, the base may not register it at all and the charge LED stays off. The fix is to briefly apply a low trickle current externally — or in some cases, simply seating and reseating the handset a few times allows the base circuit to detect the pack and begin charging. Once the cell climbs above roughly 1.0V, the base station resumes normal charging behaviour.

Talk time shorter than original battery after replacement

NiMH cells do not deliver full rated capacity on the first cycle out of the box. For the first three to five charge and discharge cycles, talk time will be noticeably shorter than the original battery at its best. This is normal cell conditioning — the crystalline structure in the NiMH electrode needs several full cycles to form correctly. Run the handset through full use-then-recharge cycles without interrupting the charge, and talk time will step up each cycle until it stabilises at rated capacity.