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Cylindrical Ni-MH cell, silver wrap, 49.8 by 17.3 mm

Estry

Estry 1.2V 2500mAh Ni-MH Battery for Triumph 4000 9500 3738 3731

SKU CH-D851-MGCCY

A 1.2 V Ni-MH cell delivering 2500 mAh and 3.0 Wh, sized 49.8 × 17.3 × 17.3 mm and weighing 62.0 g, built to replace Triumph 4000 and 9500 batteries numbered 3738 and 3731 with ISO 9001, RoHS.

  • Battery pack size1 Year
  • Details1.2
  • Exact-fit replacement for Triumph 4000 and 9500 models
  • 2V 2500mAh Ni-MH chemistry delivers 3.0Wh of reliable power
  • Built-in overcharge, over-discharge and short-circuit protection extends service life
  • Certified to ISO9001, RoHS, CE, UN38.3 and MSDS standards
  • Compact 49.8 x 17.3 x 17.3mm design weighs just 62.0g

Replacement for Triumph 4000 and 9500

This Estry Ni-MH cell replaces the original battery in Triumph 4000 and 9500 devices. It matches the factory specifications for voltage and capacity so the host equipment runs as intended. Buyers who need a different form factor or a higher capacity must choose another product.

Certified build with protection circuit

The pack measures 49.8 by 17.3 by 17.3 mm and weighs 62.0 g, fitting the existing battery compartment without modification. It carries ISO 9001, RoHS, CE, UN 38.3 and MSDS certifications and includes over-charge, over-discharge, over-voltage and short-circuit protection for safer daily use.

Ni-MH chemistry limits

The 1.2 V, 2500 mAh cell delivers 3.0 Wh of energy, which is fixed by the nickel-metal hydride chemistry. It does not support the higher energy density or lower self-discharge of lithium-based packs, so users who need longer shelf life or lighter weight should look elsewhere.

How it compares

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

Price $11.99
Pricier than about 55% of the 10,440 comparable items (median $10.99).

Specifications

Product
Brand nameNi-MH
Model name2,500 mAh
In the box
Battery pack size1 Year

Questions about this item

What voltage and capacity does the Estry 1.2V 2500mAh Ni-MH battery deliver?

The pack supplies 1.2 V and 2500 mAh, giving 3.0 Wh of energy for compatible Triumph devices.

What are the exact dimensions and weight so I can confirm it fits my Triumph 4000 or 9500?

It measures 49.8 x 17.3 x 17.3 mm and weighs 62.0 g, matching the original 3738 and 3731 form factor.

How should I install the replacement cell and what common mistake should I avoid?

Insert the new cell with correct polarity, then charge fully before first use; skipping the initial full charge is the step most users miss.

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