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Rectangular Ni-MH battery pack, green shrink wrap, white label, 42.64 x 30.0 x 14.45mm

Estry

Estry ET550 3.6V 600mAh Ni-MH standard battery

SKU CH-3HXC-CA7JM MPN ET550

Replacement Ni-MH battery delivers 3.6 V and 600 mAh for compatible cordless devices

  • Battery pack size1 Year
  • Details3.6
  • Direct replacement for Radio Shack ET550 QTA36A TAD1015 43564 43774 ET557
  • 6V 600mAh Ni-MH chemistry delivers 2.16Wh reliable power
  • Compact 42.64 x 30.0 x 14.45mm fits original battery compartment
  • Certified ISO9001 RoHS CE UN38.3 MSDS for safety and quality
  • Overcharge over-discharge over-voltage short-circuit protection extends service life

Direct replacement for cordless handsets

The Estry ET550 is a 3.6V 600mAh nickel-metal hydride pack built to match the original specifications of several legacy handset models. It delivers 2.16Wh of energy in a sealed cell that fits the existing battery compartment without modification.

Fits existing compartments and charging bases

Measuring 42.64 by 30.0 by 14.45 millimetres and weighing 63.3 grams, the pack slides into the same slot used by part numbers ET550, QTA36A, TAD1015, 43564, 43774 and ET557. The original charger and handset circuitry manage charge termination, so no additional hardware is required.

Suitable for owners of listed legacy models

Buyers with a handset that uses one of the exact part numbers above will find a drop-in fit. Those whose devices require a different voltage, chemistry or physical layout should verify compatibility before ordering.

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 name600 mAh
In the box
Battery pack size1 Year

Questions about this item

How long will the 600mAh capacity last under continuous drain?

The 600mAh rating means it delivers 600 milliamps for one hour; actual runtime depends on the device's current draw.

Does the Ni-MH pack heat up during all-day operation?

Normal operation stays cool; only sustained high-current discharge or overcharging would raise temperature noticeably.

Which device models accept the ET550 pack?

Compatible models include ET550, QTA36A, TAD1015, 43564, 43774 and ET557.

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