T-Sinus NS-3098 Cordless Phone Replacement Battery 2.4V 700mAh

T-Sinus NS-3098 — 2.4V Ni-MH Replacement Battery (NS-3098)

This is a 2.4V, 700mAh Ni-MH replacement battery for T-Sinus cordless phones using OEM part number NS-3098 or BC101590. It restores power to handsets that no longer hold a charge or have degraded significantly through age and normal use. Voltage, connector, and cell count match the original specification.

• NS-3098 and BC101590 compatibility: Both part numbers reference the same 2.4V two-cell NiMH pack used across this T-Sinus handset range. Cell count and voltage rail are identical, so the base station charging circuit sees no difference.
• Bench tested on actual hardware: We cycled this pack through three full charge and discharge passes on a NiMH-capable analyser. The BMS held voltage within tolerance across all three cycles, reaching rated capacity by the third pass.
• First charge on cordless NiMH packs: After fitting, seat the handset in the base and leave it for a full 16 hours before first use. NiMH cells in cordless phones respond to slow trickle charging — the base station's charge circuit is built around that rate, not a fast top-up.

Talk time shorter than original battery after replacement

NiMH cells ship in a partial-discharge state and don't hit rated capacity on the first cycle. A new 700mAh pack will typically deliver noticeably less talk time for the first three to five full cycles. Each full charge and full discharge adds recoverable capacity until the cells are properly conditioned. By cycle four or five, talk time should match or closely approach the rated figure.

Base station showing no charge or error light after swap

If a NiMH pack sits in storage for several months, cell voltage can drop well below 1.0V per cell — low enough that some base station charging circuits refuse to initiate a charge cycle. The base reads the incoming voltage, and if it's below the acceptance threshold, it signals a fault rather than charging. Place the handset in the base, wait 10 to 15 minutes, then remove and reseat it firmly. If the error clears, the pack has accepted enough trickle current to cross the threshold — leave it for a full 16-hour charge.