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A small rectangular lithium-polymer battery pack with two wire leads and a connector

MPF Products

MPF Products 600mAh AHB622540N01 Battery for Sennheiser HD 4.40 4.50 Urbanite XL Momentum 2.0

SKU CH-CHX7-RBK5P

600 mAh 3.7 V lithium-polymer replacement battery for Sennheiser HD 4.40, HD 4.50, Urbanite XL and Momentum 2.0 headphones

  • Product typeAccessories
  • Extended listening time with 600mAh capacity
  • Reliable power from 3.7V lithium-polymer chemistry
  • Direct replacement for AHB622540N01 part number
  • Fits HD 4.40, HD 4.50 and Urbanite XL models
  • Compatible with Momentum 2.0 wireless headphones

Replacement Battery for Sennheiser Headphones

This 600mAh lithium-polymer pack replaces the original AHB622540N01 cell in Sennheiser HD 4.40, HD 4.50, Urbanite XL and Momentum 2.0 wireless models. It restores the factory 3.7V 2.2Wh specification so the headphones regain their rated runtime. The part is new and carries a one-year replacement warranty from the manufacturer. Installation requires opening the earcup and reconnecting the existing connector.

Capacity and Chemistry Limits

The 600mAh capacity and 2.2Wh energy rating define the maximum playtime between charges; no higher-capacity cell fits the same cavity. Lithium-polymer chemistry delivers the nominal 3.7V voltage but will degrade with repeated cycles, so runtime will gradually shorten over years of daily use. The pack has no built-in fuel gauge; the headphones estimate remaining charge from voltage alone. Extreme cold or heat will temporarily reduce available capacity below the rated figure.

Upgrading from a Worn Original Cell

This battery replaces an exhausted or swollen original pack that no longer holds a usable charge. The jump is worth it when the headphones cut out early, show rapid percentage drops or physically bulge at the earcup. It is not for owners seeking longer life than the factory design, nor for models outside the listed compatibility list. If the headset has additional faults such as a damaged charging circuit, a fresh cell will not restore operation.

How it compares

Measured against everything we stock in Earbuds & Over-Ear Headphones, at today’s prices. Recalculated every night.

Price $5.99
Cheaper than about 97% of the 7,078 comparable items (median $25.99).

Specifications

Product
Product typeAccessories

Questions about this item

Which capacity matches the original AHB622540N01 cell?

The pack is a 600mAh 3.7V lithium-polymer unit rated at 2.2Wh, matching the original specification.

What runtime does the 2.2Wh rating actually give in the headphones?

It restores the factory 2.2Wh capacity, so wireless playtime returns to the level Sennheiser specified for the HD 4.40, HD 4.50, Urbanite XL and Momentum 2.0.

What connector standard does the pack use and what voltage does it deliver?

It uses the original Sennheiser plug and delivers a nominal 3.7V, capping charge at the standard lithium-polymer limit for these models.

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