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Rectangular Ni-MH battery pack, 89.3 by 46.5 by 37.8mm, dark wrap with label

Estry

Estry FA-294 6.0V 4200mAh 25.2Wh standard battery

SKU CH-4YRY-DV8RN MPN FA-294

Ni-MH 6.0V 4200mAh 25.2Wh replacement pack for Siemens FA-294, FA-298, FA-277, FA-278, FA-299 and FA-292 models

  • Battery pack size1 Year
  • Details6
  • 0 V 4200 mAh capacity powers compatible Siemens devices longer
  • 2 Wh energy rating delivers extended runtime between charges
  • Fits models 277 278 292 294 298 299 for direct replacement
  • 3 x 46.5 x 37.8 mm form factor matches original dimensions
  • Certified to ISO9001 RoHS CE UN38.3 MSDS for safety compliance

Direct replacement for Siemens devices

The Estry FA-294 is a nickel-metal hydride battery built to match the original specifications for compatible Siemens equipment. It fits models FA-294, FA-298, FA-277, FA-278, FA-299 and FA-292 without modification. Buyers who need a different voltage or connector layout should look elsewhere.

Steady output during extended operation

Rated at 6.0 volts and 4200 milliampere-hours, the pack delivers 25.2 watt-hours of energy for long runtime. Internal protection guards against overcharge, over-discharge, over-voltage and short circuits to maintain stable performance across full discharge cycles.

Low heat and safe chemistry in normal use

Ni-MH construction runs cool without active cooling and produces no audible noise. The 405.0 gram unit measures 89.3 by 46.5 by 37.8 millimetres and carries ISO9001, RoHS, CE, UN38.3 and MSDS certifications for regulated environments.

How it compares

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

Price $31.99
Pricier than about 86% of the 10,440 comparable items (median $10.99).

Specifications

Product
Brand nameNi-MH
Model name4,500 mAh
In the box
Battery pack size1 Year

Questions about this item

How much heat does the 6.0V 4200mAh Ni-MH pack generate during continuous all-day use?

Nickel-metal-hydride chemistry runs cool under normal load; the 25.2Wh capacity means modest internal resistance, so the pack stays near ambient temperature during extended operation.

What must I already own for this Estry FA-294 replacement to work?

You need a device that accepts the original Siemens FA-294, FA-298, FA-277, FA-278, FA-299 or FA-292 battery, as the pack is a direct drop-in for those models.

Will the 89.3 x 46.5 x 37.8mm pack fit alongside the older FA-277 and FA-278 batteries I still use?

Yes, the dimensions match the original Siemens specifications, so it occupies the same compartment and works interchangeably with the legacy FA-277 and FA-278 packs.

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