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Rectangular lithium-ion battery pack, dark wrap, two-wire connector, 69 by 37 by 37 mm

FYIOGXG 6400mAh 7.4V Battery for Kilburn II, Kilburn II V2

SKU CH-NHX2-ZSPBN

Replacement lithium-ion battery delivering 6400mAh at 7.4V for Kilburn II and Kilburn II V2 speakers

  • Battery pack size69 × 37 × 37
  • Battery typeLithium ion
  • Battery capacity6,400 mAh
  • Battery voltage rating7.4 V
  • Details69 × 37 × 37
  • Product typeLithium ion
  • 6400 mAh capacity powers Kilburn II speakers longer
  • 4 V lithium-ion pack matches original voltage spec
  • 36 Wh energy rating supports extended playback sessions
  • 69 × 37 × 37 mm form factor fits factory battery bay
  • ISO 9001, RoHS and CE certified for safety compliance

Direct Replacement Battery

This 7.4 V lithium-ion pack is built to the exact dimensions of the original Kilburn II and Kilburn II V2 speaker battery. It matches the 69.00 x 37.00 x 37.00 mm form factor and uses the same connector, so it fits without modification. Owners of those portable speakers can swap the old cell and restore factory runtime.

Sustained Output Stability

The integrated protection circuit guards against overcharge, over-discharge, over-voltage and short-circuit events during long listening sessions. A fully decoded chip communicates with the speaker's power management exactly as the original did, preventing sudden shutdowns when the charge runs low. After two or three full charge cycles the pack reaches its rated 47.36 Wh capacity and maintains consistent voltage under continuous load.

Capacity Decides Fit

At 6400 mAh and 7.4 V this battery delivers the same energy reserve the speaker was designed for. Buyers who need a higher capacity for longer playtime cannot use this part, and anyone whose speaker requires a different voltage or connector must look elsewhere. Verify the part numbers 7252-XML-SP, C196A1 or TF18650-3200-4S2PA on your original cell before ordering.

How it compares

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

Price $19.99
Pricier than about 76% of the 10,440 comparable items (median $10.99).

Specifications

Product
Brand nameFYIOGXG
Model nameReplacement battery
Product typeLithium ion
Power
Battery typeLithium ion
Battery capacity6,400 mAh
Battery voltage rating7.4 V
In the box
Battery pack size69 × 37 × 37

Questions about this item

Does the 7.4 V lithium-ion pack run hot during all-day playback?

The replacement cell matches the original 7.4 V specification and includes over-voltage and short-circuit protection to limit heat build-up.

Must I already own a Marshall Kilburn II or Kilburn II V2 speaker for this battery to work?

Yes, it is built for the Kilburn II and Kilburn II V2 models and replaces part numbers 7252-XML-SP, C196A1 and TF18650-3200-4S2PA.

Will the 69.00 x 37.00 x 37.00 mm pack fit the battery bay of my original Kilburn II?

Dimensions match the factory pack exactly, so it seats in the original compartment without modification.

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