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Green Ni-MH battery pack, rectangular, 42.6 by 29.95 by 14.54 mm, 87.2 g

Estry

Estry 600mAh 3.6V Ni-MH battery for GP 30AAAM3BML T255

SKU CH-VZCS-7H2GK

Ni-MH replacement pack delivers 3.6 V and 600 mAh for GP 30AAAM3BML T255 devices

  • Battery pack size1 Year
  • Details3.6
  • Exact-fit replacement for GP 30AAAM3BML and T255
  • 600mAh 3.6V Ni-MH delivers 2.16Wh runtime
  • ISO 9001, CE, RoHS, UN 38.3 and MSDS certified
  • Overcharge, over-discharge, over-voltage and short-circuit protection built in
  • Compact 42.6 x 29.95 x 14.54 mm pack weighs 87.2g

Replacement Ni-MH battery for GP models

This Estry Ni-MH battery replaces the GP 30AAAM3BML and T255 packs in cordless phones and similar devices. It supplies 3.6V and 600mAh for a 2.16Wh energy rating. The physical pack measures 42.6 x 29.95 x 14.54mm and weighs 87.2g. Buyers needing a different voltage, capacity or form factor cannot use this unit.

Ni-MH chemistry limits

Nickel-metal-hydride cells self-discharge faster than lithium types and lose capacity if stored fully charged for long periods. They perform best when cycled regularly and kept at moderate temperatures. The pack includes overcharge, over-discharge, over-voltage and short-circuit protection circuits. It does not support rapid-charge protocols beyond the original charger specification.

Simple two-wire installation

Installation requires disconnecting the old pack and connecting the new one to the same two-wire harness inside the handset or base. Polarity must match the original connector exactly; reversed wires trigger the protection circuit and prevent charging. No soldering or firmware steps are needed. The most common error is fitting the pack without verifying the part numbers 30AAAM3BML or T255 on the original label.

How it compares

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

Price $12.99
Pricier than about 60% of the 10,440 comparable items (median $10.99).

Specifications

Product
Brand nameNi-MH
Model name600 mAh
In the box
Battery pack size1 Year

Questions about this item

Should I choose the 600mAh version or a different capacity for my GP 30AAAM3BML T255?

The 600mAh capacity matches the original specification for the GP 30AAAM3BML T255. Selecting this exact rating ensures the correct runtime and charge behaviour the device expects.

What does the 3.6V 600mAh rating deliver once the pack is installed?

The pack supplies 3.6 volts at 600 milliampere-hours, yielding 2.16 watt-hours. This restores the original voltage and energy capacity the GP 30AAAM3BML T255 was designed for.

What interface standard does the pack use and what does it limit in practice?

The replacement uses the same physical connector and Ni-MH chemistry as the original 30AAAM3BML T255 pack, so it fits the existing charging circuit and is limited by that device's charge controller.

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