Samsung SPR-5050 Cordless Phone Compatible Battery 3.6V 700mAh

Samsung SPR-5050 / SPR-5060 — 3.6V Ni-MH Replacement Battery (60AAAH3BMU)

This is a 3.6V, 700mAh Ni-MH battery pack for the Samsung SPR-5050 and SPR-5060 cordless handsets. It replaces OEM part 60AAAH3BMU and restores wireless operation when the original cell no longer holds charge. The pack matches the original voltage rail and connector so the base station charges it the same way it charged the factory battery.

• SPR-5050 and SPR-5060 compatibility: Both models share the same 3.6V three-cell NiMH configuration, identical connector pinout, and the same base station charge circuit. One pack covers both handsets.
• Bench tested on actual hardware: We ran this pack through the SPR-5060 base station charge cycle and confirmed the BMS accepted charge without error and delivered stable voltage across standby and active RF transmit loads.
• First-charge protocol for NiMH handsets: Place the handset in the base immediately after installing the new pack and leave it for a full 16 hours before first use. NiMH cells arrive partially discharged from storage — skipping this slow first charge means the pack will not reach its rated 700mAh capacity and talk time will fall short.

Base station showing a charging error on a new NiMH pack

Samsung's SPR-series base stations check for a minimum voltage before they begin the charge cycle. A NiMH pack that has sat in storage can drop below that threshold, typically around 3.0V, and the base rejects it as a fault condition rather than a flat battery. The fix is a slow top-up with a compatible external NiMH charger to bring the pack above 3.2V, then seat it in the base again. Once the base sees an acceptable voltage, the error clears and normal charging resumes.

Range drops noticeably when the new battery is under RF load

A fresh NiMH pack has not yet gone through full conditioning, so its internal resistance is higher than it will be after several charge cycles. Under the burst current demand of DECT RF transmission, that resistance causes a voltage sag that reduces transmit power and cuts effective range. This is normal for the first three to five charge-discharge cycles — range improves as internal resistance drops with each cycle. Run the handset through full discharge and recharge cycles rather than topping it up frequently during this break-in period.