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Rectangular Ni-MH battery pack, green label, 50.8 by 29.2 by 27.6 mm

Estry

Estry standard battery 2000mAh 3.6V for TDK Life on Record A28 Trek Flex 3AA-HHC

SKU CH-9RGZ-ZV4JN

Ni-MH replacement pack rated at 3.6 V and 2000 mAh fits TDK Life on Record A28 Trek Flex models using part 3AA-HHC

  • Battery pack size1 Year
  • Details3.6
  • Replaces original TDK A28 Trek Flex battery with exact-fit 2000mAh Ni-MH pack
  • Delivers 3.6V and 7.2Wh for reliable portable recorder runtime
  • Built-in overcharge, over-discharge and short-circuit protection extends cell life
  • Certified to ISO9001, RoHS, CE, UN38.3 and MSDS safety standards
  • Compact 50.8 x 29.2 x 27.6mm size weighs only 154.0g for easy carry

Direct replacement for TDK A28 Trek Flex

This Estry Ni-MH battery pack matches the original 3.6V 2000mAh specification for the TDK Life on Record A28 Trek Flex and A28 models. It replaces part number 3AA-HHC and supplies 7.2Wh of energy. The pack measures 50.8 x 29.2 x 27.6mm and weighs 154.0g.

Protected cells maintain output during extended

Built-in overcharge, over-discharge, over-voltage and short-circuit protection helps the pack deliver steady voltage through long sessions. ISO9001, RoHS, CE, UN38.3 and MSDS certifications confirm consistent manufacturing quality. The chemistry is rated for a one-year service life under normal use.

Verify model and part number before ordering

Confirm your recorder is a Life on Record A28 or A28 Trek Flex and that the original pack carries part number 3AA-HHC. The connector and physical dimensions 50.8 x 29.2 x 27.6mm must match the battery compartment exactly. This pack is not suitable for devices requiring a different voltage, capacity or form factor.

How it compares

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

Price $15.99
Pricier than about 70% of the 10,440 comparable items (median $10.99).

Specifications

Product
Brand nameNi-MH
Model name2,000 mAh
In the box
Battery pack size1 Year

Questions about this item

Does the 3.6 V 2000 mAh Ni-MH pack run hot during continuous use?

The replacement pack uses Ni-MH chemistry and built-in over-charge, over-discharge, over-voltage and short-circuit protection to limit heat during extended operation.

What must I already own for this Estry pack to work?

You need a TDK Life on Record A28 or Trek Flex device that accepts the 3AA-HHC part number and a 3.6 V Ni-MH pack measuring 50.8 x 29.2 x 27.6 mm.

Will the 7.2 Wh pack fit the original battery compartment in my A28?

Yes — it matches the exact 3AA-HHC dimensions and voltage, so it slots into the existing compartment without modification.

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