Ericsson DECT200 Replacement Battery 3.6V 600mAh Ni-MH

Ericsson DECT200 / DECT230 Series — 3.6V Ni-MH Replacement Battery (NTM/BKBNB 101 13/1)

This is a 3.6V, 600mAh Ni-MH battery for the Ericsson DECT200, DECT230, DECT230i, and DT-200 cordless handsets. It replaces OEM part NTM/BKBNB 101 13/1 and cross-references CP15NM, NC2136, and BC101272. The cell fits the original battery bay without modification and restores standard talk time and standby capacity.

• DECT200 / DECT230 platform compatibility: These handsets share the same 3.6V single-cell Ni-MH architecture, battery footprint, and connector pinout. Any model in this series that accepts NTM/BKBNB 101 13/1 will accept this cell directly.
• Bench tested on actual hardware: We cycled this battery through charge and discharge on a DECT handset platform at 3.6V nominal. The BMS accepted the cell without fault codes, and voltage held stable under RF transmit load throughout the test.
• First charge on a NiMH cordless handset: After installing, seat the handset in the base and leave it for a full 16 hours before use. Ni-MH cells in cordless phones ship partially discharged. A slow first charge lets the cells reach rated capacity — skipping it leaves you with noticeably shorter talk time from day one.

Base station showing no charge light on a fresh Ni-MH pack

Ericsson DECT bases use a delta-V detection circuit to confirm a battery is accepting charge. A new Ni-MH cell that has discharged during storage can sit below the voltage threshold the base expects at contact. The base interprets this as an absent or faulty battery and skips the charge cycle entirely. If the charge indicator stays off, remove the handset, leave it out for 30 seconds, then reseat it firmly — this resets the base's detection polling. If the issue persists, check the battery contact voltage with a multimeter; a reading below 3.0V means the cell needs a trickle pre-charge before the base will recognise it.

Talk time shorter than original battery after replacement

Ni-MH cells do not deliver full rated capacity on the first charge cycle — this is normal chemistry, not a fault. Rated capacity at 600mAh is reached after three to five full charge-and-discharge cycles on most DECT handsets. If talk time is still noticeably short after five cycles, check that the handset contacts are clean and making firm contact with the base cradle. A dirty or bent contact pin causes trickle current instead of a full charge — wipe the gold contacts on both the handset and base with a dry cloth and confirm the handset seats without wobble.