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3x Battery for Sennheiser EKI 830; HDI 830; RR 840, 4200, 840 S BA300 BA 300 (150mAh, 3.7V) from CELLONIC

(53 reviews)
Article number: 923508

Not available

Expected on 13.11.2026

5% discount if ordered in advance

Shipping: 2.95 €

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1x Battery (150mAh, 3.7V)
Special Price €9.95 Regular Price €12.43
1x Battery (150mAh, 3.7V)
2x Battery (150mAh, 3.7V)
Special Price €18.00 Regular Price €18.95
2x Battery (150mAh, 3.7V)
3x Battery (150mAh, 3.7V)
Special Price €23.70 Regular Price €24.95
3x Battery (150mAh, 3.7V)

What our customers say

4.9 (53)

Customers often mention

Also mentioned: Fast delivery (12)

  • Verified buyer Germany

    I ordered these batteries 3 years ago. This battery may not last as long as the original, but it's worth it. The battery fits perfectly, is inexpensive and reliable in operation. Delivery was very quick and well packaged. Thank you and I'll be happy to order again.

  • Anna Italy

    Product usually purchased on Amazon, here it costs less and is shipped sooner (it is the same supplier from which I purchased). The only 'bore' is the lack of tracking for the shipment, but if you are not in a hurry, they arrive home in 3-5 working days max. Advise!

  • Verified buyer Germany

    I ordered these batteries 3 years ago. This battery may not last as long as the original, but it's worth it. The battery fits perfectly, is inexpensive and reliable in operation. Delivery was very quick and well packaged. Thank you and I'll be happy to order again.

  • Evelyne France

    Batteries received charged. Compatible with my Schneider headphones.

  • Verified buyer Germany

    I ordered these batteries 3 years ago. This battery may not last as long as the original, but it's worth it. The battery fits perfectly, is inexpensive and reliable in operation. Delivery was very quick and well packaged. Thank you and I'll be happy to order again.

  • Anna Italy

    Product usually purchased on Amazon, here it costs less and is shipped sooner (it is the same supplier from which I purchased). The only 'bore' is the lack of tracking for the shipment, but if you are not in a hurry, they arrive home in 3-5 working days max. Advise!

Fits your

We have not listed this product as compatible with the

That does not necessarily mean it will not fit — our compatibility list is not exhaustive.

Does this product fit your device?

Fits 15 devices

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Description

Headphone and headset replacement batteries from CELLONIC

A replacement battery can help you keep using your headphones for music, calls and gaming when their battery is worn. Check the model, battery reference, dimensions and connection. Follow the manufacturer’s procedure when replacing an internal battery.

Compatible models (selection): Sennheiser RR 4200, 840, 840 S; HDI 830; EKI 830

Check model compatibility

Capacity: 150mAh
Voltage: 3.7V
Cell type: Lithium-Polymer
Energy: 0.56Wh
Quantity: 3x
Battery type: BA300 BA 300
Length (mm): 32
Width (mm): 25
Height (mm): 18

Before ordering, compare your device, battery type and specifications with the product details.

Compatibility

Sennheiser RR 4200, Sennheiser HDI 830, Sennheiser RR 840, Sennheiser RR 840 S, Sennheiser EKI 830, Sennheiser RI 410 (IS 410), Sennheiser RI 830 (Set 830 TV), Sennheiser RI 830-S (Set 830-S), Sennheiser RI 840 (Set 840 TV), Sennheiser RI 840-S (Set 840-S), Sennheiser RI 900 (Set 900), Sennheiser RS 4200 (IS 410), Sennheiser Set 843 TV (RR-843), Siemens RR 832 (Set 832 TV), Siemens RR 842 (Set 842 TV)

See the Compatibility tab for the complete checked list and applicable restrictions.

subtel has specialised in batteries and accessories since 2004.

Technical details
Article number: 923508
Weight: 36 g
Length: 32 mm
Width: 25 mm
Height: 18 mm
Voltage: 3.7V
Technology: Lithium-Polymer
Capacity: 150mAh
EAN: 4250843445254
Compatibility

Fits the following devices

All devices

Reviews
The most relevant reviews are ordered by their star rating and by how detailed they are.
  • Verified buyer Germany

    I ordered these batteries 3 years ago. This battery may not last as long as the original, but it's worth it. The battery fits perfectly, is inexpensive and reliable in operation. Delivery was very quick and well packaged. Thank you and I'll be happy to order again.

    This review was translated automatically. Source language was
    Habe diese Akkus schon mal vor 3 Jahren bestellt.
    Dieser Akku mag vielleicht nicht so lange halten wie das Original, aber unter dem Strich rechnet es sich. Akku ist passgenau, preisgünstig und im Betrieb zuverlässig.
    Lieferung sehr schnell und gut verpackt. Danke und gerne wieder.
  • Anna Italy

    Product usually purchased on Amazon, here it costs less and is shipped sooner (it is the same supplier from which I purchased). The only 'bore' is the lack of tracking for the shipment, but if you are not in a hurry, they arrive home in 3-5 working days max. Advise!

    This review was translated automatically. Source language was
    Prodotto solitamente acquistato su Amazon, qui costa meno e viene spedito prima (è lo stesso fornitore da cui acquistavo). Unica ‘noia’ è la mancanza di un tracking per la spedizione, ma se non si ha fretta in 3-5 giorni lavorativi max arrivano a casa. Consiglio!
  • Verified buyer France

    Impeccable products. Batteries for TV headphones difficult to find in France. Thank you.

    This review was translated automatically. Source language was
    Produits impeccables. Batteries pour écouteurs tv difficiles à trouver en France. Merci.
Product safety

Manufacturer / EU Responsible person

Manufacturer subtel GmbH
Address Mainzer Str. 3, Berlin, 10247, Germany
E-mail info@subtel.nl
Safety data sheet download