Conair CTP9400 Replacement Battery 3.6V 700mAh Ni-MH

Conair CTP9400 / CTP9410 — 3.6V Ni-MH Replacement Battery

This is a 3.6V, 700mAh Ni-MH battery for the Conair CTP9400 and CTP9410 cordless DECT handsets. It replaces the original pack when the handset no longer holds a charge through a full conversation. Dimensions are 45.60 × 31.30 × 10.60mm — verify against your existing cell before installing.

• CTP9400 and CTP9410 compatibility: Both handsets run on the same 3.6V NiMH cell with identical connector orientation and footprint. One battery covers both models without any modification.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on a DECT handset platform. The cell accepted a full charge from the base station cradle and voltage held within spec across transmission bursts.
• First charge after installation: Seat the handset in the base for a full 16 hours before first use. NiMH cells ship partially discharged, and a slow initial charge is what brings the pack to rated 700mAh capacity — skipping it leaves you with noticeably shorter talk windows for the first several uses.

Base station charge light not coming on after installing a new NiMH pack

NiMH batteries lose voltage during storage. If the pack sits in a warehouse long enough, its resting voltage can drop below the threshold the base station uses to confirm a valid battery is present. Many Conair bases won't initiate the charge cycle if they don't sense a voltage above roughly 3.0V on the contacts. The fix is a brief external top-up — a compatible NiMH charger at 50–100mA for 20 to 30 minutes is enough to bring the pack above the acceptance floor. After that, drop it back in the base and the charge indicator should activate normally.

Handset loses range or call quality drops near the edge of the house after swap

DECT handsets draw a spike of current every time the RF module transmits a burst. A NiMH pack that hasn't completed its conditioning cycles can't deliver that current without its voltage sagging below the handset's RF power threshold. When voltage sags, the transmit power drops, and range shrinks noticeably. Run three to five full charge-and-discharge cycles through the base station — by cycle four, the cell's internal resistance settles and voltage holds steady through the transmit spike. Range should return to the original handset spec after conditioning is complete.