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Rectangular lithium battery pack, dark grey plastic, 50.9 by 33.4 by 3.7 mm

Estry

Estry HS70 700mAh 3.7V standard battery

SKU CH-NBBS-0GQMK MPN HS70

Replacement lithium cell restores power to compatible Corsair HS70 and H2100 wireless headsets with 700 mAh capacity and 3.7 V output

  • TypeRechargeable Batteries
  • Battery TypeLithium
  • Battery Capacity700mAh
  • Battery Voltage3.7
  • Direct replacement for CORSAIR HS70 headsets
  • 700mAh 3.7V lithium cell restores original runtime
  • Built-in overcharge, over-discharge and short-circuit protection
  • Compact 50.9 x 33.4 x 3.7 mm form fits battery bay
  • Certified to ISO9001, RoHS, CE, UN38.3 and MSDS standards

Direct replacement battery

The Estry HS70 is a 3.7V 700mAh lithium rechargeable cell built to match the original specifications for Corsair HS70 Void Pro RGB and H2100 wireless gaming headsets. It carries ISO9001, RoHS, CE, UN38.3 and MSDS certifications and includes overcharge, over-discharge, over-voltage and short-circuit protection. The cell measures 50.9 x 33.4 x 3.7mm and weighs 38.0g.

Upgrade from a depleted original cell

This battery replaces the factory MH45908 pack when runtime has dropped noticeably or the headset no longer holds a charge through a full session. The jump is worth it when the original cell shows swelling, rapid voltage sag under load, or fails to reach the rated 2.59Wh capacity after a full charge cycle.

Simple two-wire solder installation

Installation requires opening the ear cup, desoldering the old pack and soldering the new cell to the existing connector or PCB pads. Polarity must match the original wiring exactly; reversed leads will trigger the protection circuit and prevent charging. A common error is forgetting to insulate the solder joints, which can short against the metal shielding inside the cup.

Highlights

  • Direct replacement for CORSAIR HS70 headsets
  • 700mAh 3.7V lithium cell restores original runtime
  • Built-in overcharge, over-discharge and short-circuit protection
  • Compact 50.9 x 33.4 x 3.7 mm form fits battery bay
  • Certified to ISO9001, RoHS, CE, UN38.3 and MSDS standards

Specifications

BrandCORSAIR
TypeRechargeable Batteries
Battery TypeLithium
Battery Capacity700mAh
Battery Voltage3.7

Questions about this item

What are the exact dimensions of this 700mAh 3.7V battery?

The battery measures 50.9 x 33.4 x 3.7 mm and weighs 38.0 g, matching the original MH45908 form factor for the HS70 headset.

How do I install this replacement battery in my HS70 headset, and what step is often missed?

Open the ear cup, disconnect the old pack, and connect the new battery's identical plug; the step often missed is routing the wires so they are not pinched when the cover snaps shut.

When will this lithium battery need replacement, and what certifications back its safety?

The 2.59 Wh cell carries ISO9001, RoHS, CE, UN38.3 and MSDS certifications; replace it once runtime drops noticeably or the pack swells.

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