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Rectangular lithium-polymer battery, blue wrap, 53.4 by 14.4 mm, 23.0 g

FYIOGXG Replacement Battery for Sennheiser 508494, 508497, XSW-D 1000mAh 3.7V

SKU CH-998T-ZQGQM

Replacement lithium-polymer battery for Sennheiser 508494, 508497, RX XLR, TX XLR and XSW-D, 1000 mAh at 3.7 V

  • Battery pack size53.4 × 14.4 × 14.4
  • Battery typeLithium polymer
  • Battery capacity1,000 mAh
  • Battery voltage rating3.7 V AC
  • Details53.4 × 14.4 × 14.4
  • Product typeLithium polymer
  • Compatible with Sennheiser 508494, 508497, XSW-D, RX XLR, TX XLR
  • 1000 mAh capacity at 3.7 V for reliable wireless runtime
  • Lithium-polymer cell with overcharge, over-discharge and short-circuit protection
  • Compact 53.40 x 14.40 x 14.40 mm form factor fits original housing
  • ISO 9001, RoHS and CE certified for quality and safety assurance

Replacement Battery for Sennheiser 508494 and 508497

This lithium-polymer cell replaces the original Sennheiser 14500CY-850 pack in XSW-D, RX XLR and TX XLR wireless units. It delivers 1000mAh at 3.7V and weighs 23.0g. The fully decoded chip communicates with the host exactly like the factory battery.

Steady Output During Long Sessions

The 1000mAh capacity supports extended recording or performance periods without the voltage sag seen in aged cells. Built-in protection guards against overcharge, over-discharge, over-voltage and short circuits, so output remains stable across the full discharge curve. ISO9001, RoHS and CE certification confirm consistent manufacturing quality.

Upgrade from Depleted or Swollen Originals

Install this pack when the original no longer holds a full charge or shows physical swelling. It restores the runtime the system was designed for without modifying the device. Users who need higher capacity than 1000mAh or a different form factor will not be served by this model.

How it compares

Measured against everything we stock in Household Batteries & Chargers, at today’s prices. Recalculated every night.

Price $13.99
Pricier than about 63% of the 10,440 comparable items (median $10.99).

Specifications

Product
Brand nameFYIOGXG
Model nameReplacement for
Product typeLithium polymer
Power
Battery typeLithium polymer
Battery capacity1,000 mAh
Battery voltage rating3.7 V AC
In the box
Battery pack size53.4 × 14.4 × 14.4

Questions about this item

Does the 3.7 V lithium-polymer cell generate noticeable heat during a full day of wireless use?

The 1000 mAh pack runs at a low 3.7 V, so heat build-up stays minimal even after hours of continuous transmission.

Which Sennheiser part numbers must my transmitter or receiver already carry for this battery to fit?

It replaces Sennheiser 14500CY-850 and fits devices marked 508494, 508497, RX XLR, TX XLR or XSW-D.

Will the 53.40 x 14.40 mm form factor slide into my existing Sennheiser XSW-D bodypack without modification?

Yes, the dimensions match the original 14500CY-850 cell, so it seats directly in the XSW-D battery compartment.

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