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Rectangular lithium battery, dark grey finish, 53 by 33 by 7.78 mm, 52.0 g

Estry

Estry 950mAh 3.7V Lithium Battery for Harmony 720/One/890/880

SKU CH-N500-8MWKX

A 950mAh 3.7V lithium replacement battery for Harmony 720, One, 890, 880 and 880 Pro remotes

  • TypeRechargeable Batteries
  • Battery TypeLithium
  • Battery Capacity950mAh
  • Battery Voltage3.7
  • Replaces original battery in Harmony 720, One, 890 and 880 remotes
  • 950 mAh lithium cell delivers 3.52 Wh for extended runtime
  • Built-in protection guards against overcharge, over-discharge and short circuits
  • Certified to ISO 9001, RoHS, CE and UN 38.3 standards
  • Compact 53.07 × 33.08 × 7.78 mm form factor weighs 52.0 g

Direct replacement for Harmony remotes

This 950mAh 3.7V lithium battery matches the original specifications for Harmony 720, Harmony One, Harmony 890, Harmony 880 and Harmony 880 Pro remotes. It fits part numbers including NTA2340, HHD10010, 1903040000, R-IG7, M41B and 815000037. Built-in protection guards against overcharge, over-discharge, over-voltage and short circuits.

Restores runtime lost to aged cells

Replaces a depleted original pack when the remote no longer holds a charge through a day of use. The jump is worth it when button response becomes sluggish or the device powers off during activity changes. Certified to ISO9001, RoHS, CE, UN38.3 and MSDS standards for safe, reliable operation.

Simple swap with basic tools

The pack measures 53.07 x 33.08 x 7.78mm and weighs 52.0g, matching the factory footprint. Open the remote casing, disconnect the old connector and plug in the new one — no soldering required. Verify the part number on your old battery against the compatibility list before ordering to avoid a mismatch.

Highlights

  • Replaces original battery in Harmony 720, One, 890 and 880 remotes
  • 950 mAh lithium cell delivers 3.52 Wh for extended runtime
  • Built-in protection guards against overcharge, over-discharge and short circuits
  • Certified to ISO 9001, RoHS, CE and UN 38.3 standards
  • Compact 53.07 × 33.08 × 7.78 mm form factor weighs 52.0 g

Specifications

TypeRechargeable Batteries
Battery TypeLithium
Battery Capacity950mAh
Battery Voltage3.7

Questions about this item

Will the 53.07 x 33.08 x 7.78mm cell fit my Harmony 880 Pro battery compartment?

The cell measures 53.07 x 33.08 x 7.78mm and weighs 52.0g, matching the original NTA2340 dimensions for Harmony 880 Pro.

How do I install the replacement without damaging the Harmony One ribbon connector?

Power off the remote, open the battery door, disconnect the old pack's two-pin JST connector, plug in the new 3.7V 950mAh cell, and close the door — do not force the connector.

When should I replace this 3.52Wh lithium pack in my Harmony 890?

Replace when runtime drops noticeably or the remote fails to hold a charge; the cell includes over-charge, over-discharge, over-voltage and short-circuit protection per ISO9001, RoHS, CE, UN38.3 and MSDS.

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