Sanik 3SNAA45SX Cordless Phone Replacement Battery 3.6V 1200mAh

Sanik 3SNAA45SX — 3.6V Ni-MH Replacement Battery for Cordless Phones

This is a 3.6V, 1200mAh Ni-MH replacement battery for cordless DECT handsets that use Sanik pack part numbers 3SNAA45SX, 3SNAA80SX1, or 3SNAA60SX1. It replaces the internal rechargeable cell when the original pack no longer holds a charge. Check your handset battery compartment for any of the three OEM part numbers before ordering.

• Pack compatibility across three OEM part numbers: All three Sanik part numbers — 3SNAA45SX, 3SNAA60SX1, and 3SNAA80SX1 — share the same 3.6V cell configuration and connector pinout used across the same handset platform. One replacement cell fits all three original pack designations without modification.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on a DECT handset base station. The NiMH BMS accepted the charging current from the base without error, and cell voltage held above 3.2V through a full standby cycle.
• First-charge protocol for NiMH cordless packs: After installing, seat the handset in the base and leave it there for a full 16 hours before first use. NiMH cells arrive partially discharged from storage. A slow, full initial charge allows each cell in the pack to reach rated capacity — skipping this shortens usable charge from the first day.

Base station showing a charging error with a new NiMH pack

DECT bases use a delta-V detection method to confirm charging. If the battery rests below roughly 3.0V from extended storage, the base may not register enough voltage rise to begin its charge cycle, triggering an error light instead. This is a voltage floor issue, not a fault with the pack itself. Place the handset in the base, wait 10 minutes, remove it, then reseat it firmly — this forces the base to re-initiate the charge handshake at the current cell voltage.

Talk time shorter than the original battery after replacement

NiMH cells do not deliver rated capacity on the first charge cycle. Capacity builds across the first three to five full charge-and-discharge cycles as the cell chemistry stabilises. If talk time is noticeably short after a swap, avoid topping up between calls — run the handset until the low-battery alert sounds, then return it to the base for a complete charge. By cycle four or five, measured capacity should be close to the rated 1200mAh.