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Rectangular lithium battery pack, matte black finish, 53.0 by 35.2 by 10.9mm

Estry

Estry BT-03 Battery for Zoom Q8 Recorder 1800mAh 3.7V

SKU CH-241P-ACD7Z

Lithium replacement battery delivers 1800mAh at 3.7V for the Zoom Q8 recorder with overcharge and short-circuit protection

  • Battery pack size1-pack
  • Battery typeLithium
  • Battery capacity1,800 mAh
  • Battery voltage rating3.7
  • Product typeBatteries
  • Direct replacement for Zoom Q8 recorder using BT-03 part
  • 1800mAh capacity at 3.7V delivers 6.66Wh of power
  • Built-in overcharge, over-discharge, over-voltage and short-circuit protection
  • Certified to ISO9001, RoHS, CE, UN38.3 and MSDS standards
  • Compact 53.0 x 35.2 x 10.9mm size weighs 64.0g

Replacement Battery for Zoom Q8 Recorder

The Estry BT-03 is a direct replacement lithium-ion pack built to the original specifications for the Zoom Q8 recorder. It supplies 3.7 V and 1800 mAh capacity in a single-cell format. The cell measures 53.0 x 35.2 x 10.9 mm and weighs 64.0 g, matching the factory battery compartment exactly. It is intended for owners who need a spare or a fresh cell for extended recording sessions.

Thermal Behaviour and Power Delivery

Lithium-ion chemistry delivers the rated 6.66 Wh with minimal self-heating during typical recorder operation. The pack includes integrated protection against over-charge, over-discharge, over-voltage and short-circuit events. No active cooling is required and the cell runs silently inside the recorder. The certifications cover ISO 9001, RoHS, CE and UN 38.3 transport safety.

Upgrade Path and Compatibility Limits

This unit replaces a depleted or lost Zoom BT-03 battery and restores the recorder to its original run-time. It is not for users who need higher capacity than 1800 mAh, a different voltage, or compatibility with other recorder models. Buyers requiring multi-cell packs or hot-swap charging systems should look elsewhere.

How it compares

Measured against everything we stock in Camcorder Rigs, Cases & Add-Ons, at today’s prices. Recalculated every night.

Price $11.99
Cheaper than about 93% of the 423 comparable items (median $40.99).

Specifications

Product
Brand nameZoom
Product typeBatteries
Power
Battery typeLithium
Battery capacity1,800 mAh
Battery voltage rating3.7
In the box
Battery pack size1-pack

Questions about this item

How do I install the BT-03 battery in the Zoom Q8 recorder and which way round does it go?

Open the battery compartment, align the contacts on the 53.0 x 35.2 x 10.9 mm pack with the terminals inside, and slide it in until it clicks; the shaped corners prevent reverse insertion.

What replacement will the Estry BT-03 need after extended use?

The lithium pack is rated at 1800 mAh and 6.66 Wh; when run time falls well below the original level, replace it with another BT-03 compatible cell.

What is the first limit you hit when recording continuously with this battery?

Capacity is 1800 mAh at 3.7 V, so sustained recording stops when the pack is depleted; recharge before the next session.

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