Tiptel Easy DECT 5500 Replacement Battery 3.6V 400mAh Ni-MH

Tiptel Easy DECT 5500 — 3.6V Ni-MH Replacement Battery

This 3.6V, 400mAh Ni-MH rechargeable battery fits the Tiptel Easy DECT 5500 cordless phone handset. It slots directly into the handset battery compartment, restoring talk and standby function when the original cell has degraded. Capacity is rated at 1.44Wh and matches the original cell specification.

• Easy DECT 5500 handset fit: The Easy DECT 5500 runs a 3.6V Ni-MH cell in a specific form factor — 47.25 x 34.20 x 7.87mm. This battery matches that voltage rail and physical envelope so the handset closes fully and the contacts seat correctly against the charging pins.
• Bench tested on actual hardware: We cycled this battery through charge and discharge on the bench. The cell accepted a full charge without thermal spike, and voltage held steady across the discharge curve until the handset-side low-battery indicator triggered correctly.
• First-charge conditioning for Ni-MH handsets: Place the handset in the base for a full 16-hour charge before first use. Ni-MH cells in cordless handsets need a slow initial charge to reach rated capacity — skipping this leaves the cell under-formed and talk time noticeably short in the first few uses.

Base station charge light not coming on after installing a new Ni-MH pack

Ni-MH cells can drop to very low voltage during storage — sometimes below 3.0V. Some DECT bases check terminal voltage before starting the charge cycle, and a deeply discharged cell can sit below that acceptance threshold. The base sees the voltage, decides something is wrong, and either flashes an error light or shows nothing at all. Leave the handset seated in the base undisturbed for 30–60 minutes — the trickle pre-charge circuit on most DECT bases will slowly bring the cell up to the 3.6V range before switching to normal charge mode.

Range dropping mid-call after fitting a replacement battery

DECT transmit power draws a sharp current pulse each time the handset communicates with the base. A freshly installed or under-conditioned Ni-MH cell has higher internal resistance than a fully cycled one, causing voltage to sag under that RF load. When voltage sags far enough, the handset reduces transmit power to protect the cell — range collapses noticeably. Running three full charge-and-discharge cycles conditions the cell, lowers internal resistance, and brings voltage sag back under control. After the third full cycle, check that the handset reads at least 3.6V off the charger before testing range again.