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Rectangular 6.0V 4200mAh Ni-MH battery pack, dark plastic casing with label and connector wires

Estry

Estry M-640 6.0V 4200mAh standard battery

SKU CH-QMW8-3PY4Y MPN M-640

Ni-MH replacement pack delivering 6.0 V and 4200 mAh for M-640, M-660 and M-670 models

  • Specifications6
  • Battery Pack1 Year
  • Replaces original battery in M-640 M-660 M-670 models
  • 0V 4200mAh Ni-MH chemistry delivers 25.2Wh capacity
  • Built-in protection against overcharge over-discharge over-voltage short circuit
  • Certified to ISO9001 RoHS CE UN38.3 MSDS standards
  • Compact 89.3 x 46.5 x 37.8mm pack weighs 405.0g

Compatibility & fit

This replacement pack fits the M-640, M-660 and M-670 models and replaces part numbers SBC5263, SBC-5261C and SBC-5260C. The physical size is 89.3 x 46.5 x 37.8 mm and it weighs 405.0 g. Buyers with a different model or part number should look elsewhere.

Voltage and capacity

The cell delivers 6.0 V and 4200 mAh, giving 25.2 Wh of energy. It uses Ni-MH chemistry and includes overcharge, over-discharge, over-voltage and short-circuit protection. Equipment needing a different voltage or a higher capacity will not be served by this pack.

Certified safety standards

The battery carries ISO 9001, RoHS, CE, UN38.3 and MSDS certification. These marks confirm manufacturing quality, substance restrictions and transport safety. Buyers who require additional or different regulatory approvals must verify them independently.

Highlights

  • Replaces original battery in M-640 M-660 M-670 models
  • 0V 4200mAh Ni-MH chemistry delivers 25.2Wh capacity
  • Built-in protection against overcharge over-discharge over-voltage short circuit
  • Certified to ISO9001 RoHS CE UN38.3 MSDS standards
  • Compact 89.3 x 46.5 x 37.8mm pack weighs 405.0g

Specifications

BrandNi-MH
Model4500mAh
Specifications6
Battery Pack1 Year

Questions about this item

How can I verify the Estry M-640 battery is working correctly after installation?

After fitting the pack into your M-640, M-660 or M-670 device, check that it powers on and holds a charge; the built-in over-charge, over-discharge, over-voltage and short-circuit protection should prevent abnormal heating or sudden shutdowns.

What comes in the box with the Estry M-640 and what must I source separately?

The package contains the 6.0 V 4200 mAh Ni-MH battery pack measuring 89.3 × 46.5 × 37.8 mm and weighing 405.0 g; no charger, cables or mounting hardware are included.

Which Estry replacement should I choose among the M-640, M-660 and M-670 compatible versions?

All three model numbers — M-640, M-660 and M-670 — use the same 6.0 V 4200 mAh pack, so select the one that matches the original part number SBC5263, SBC-5261C or SBC-5260C printed on your old battery.

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