Premium quality SpectraLink 8400 & 8440 Phone replacement battery is compatible with the original equipment. It is designed for perfect performance and high durability.

  • Japanese cells (Pana. / Sanyo)
  • Uses high impact Polycarbonate plastic housings for ruggedness
  • With resistance welded gold plated contacts for maximum performance
  • PCB are installed in the battery pack
  • With short-circuit protection
  • With over temperature protection
  • Provides excellent discharge characteristics
  • This product was developed and is continually tested in conjunction with original device and charging equipment.
  • It is guaranteed for complete compatibility with these.
  • Specifications of all components used meets or exceeds that of original equipment.

GLSL-8400-Li12 SpectraLink 8400 & 8440 / Li-Ion 3.7V 1200mAh

  • Product introduction

    GL Part no.




    Nominal Capacity

    1200 mAh



    Watt Hour Rating

    4.44 Wh

    OEM Part Numbers

    1520-37214-001, RS657

    Device Models

    Polycom, SpectraLink 8400, 8440, 8450, 8452


    2.58 x 1.74 x 0.44 in (65.6 x 44.2 x 11.1 mm)


    1.14 oz (32.4 g)