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Rectangular Ni-MH battery pack, matte finish, labelled 8.4V 3000mAh

Estry

Estry 3937 standard battery 8.4V 3000mAh 25.2Wh

SKU CH-JJHG-WWEAA MPN 3937

Ni-MH replacement battery for MEGATECH 3937 devices delivering 8.4V 3000mAh capacity

  • Battery pack size1 Year
  • Details8.4
  • Exact-spec replacement for MEGATECH 3937
  • 4V 3000mAh Ni-MH delivers 25.2Wh runtime
  • Overcharge, over-discharge and short-circuit protection built in
  • Certified to ISO9001, RoHS, CE, UN38.3 and MSDS
  • Compact 88.1 x 89.9 x 22.7mm pack weighs 456.0g

Ni-MH replacement battery

This Estry 3937 is a nickel-metal hydride replacement pack built to match the original specifications for the MEGATECH 3937 model. It delivers 8.4V and 3000mAh for a total energy of 25.2Wh. The pack includes overcharge, over-discharge, over-voltage and short-circuit protection. It is certified to ISO9001, RoHS, CE, UN38.3 and MSDS standards.

Compatibility and fit

The battery suits owners of a MEGATECH 3937 device who need a direct replacement with the same voltage, capacity and physical layout. Buyers with a different model number or a different voltage requirement should look at another option. Dimensions are 88.1 x 89.9 x 22.7 mm and weight is 456.0 g, so the device compartment must accept that exact footprint.

Voltage and capacity match

The single specification that decides fit is the 8.4V / 3000mAh rating; the replacement device must be designed for that exact voltage and capacity. If the original equipment calls for a different voltage or a substantially different capacity, this pack will not work correctly.

How it compares

Measured against everything we stock in Household Batteries & Chargers, at today’s prices. Recalculated every night.

Price $38.99
Pricier than about 90% of the 10,440 comparable items (median $10.99).

Specifications

Product
Brand nameNi-MH
Model name3,000 mAh
In the box
Battery pack size1 Year

Questions about this item

Does this 3937 battery replace the original pack in my MEGATECH device without any extra wiring?

Yes, it is built to the exact specifications of the original 3937 MEGATECH pack so it fits and connects directly.

Will the 8.4V 3000mAh pack run safely in equipment designed for the older Ni-MH original?

The voltage and chemistry match the original design, and built-in protection guards against overcharge, over-discharge and short circuits.

How can I confirm the battery is delivering the rated 25.2Wh after installation?

A full charge followed by a measured discharge at the rated current should yield close to 25.2Wh; the pack also carries CE, RoHS, ISO9001, UN38.3 and MSDS certification marks.

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