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Rectangular Ni-MH battery pack, dark wrap, 135.4 x 33.7 x 17.18 mm, 350.4 g

Estry

Estry 2658 4.8V 4500mAh standard battery

SKU CH-ZWYS-XWXMD MPN 2658

Ni-MH 4.8V 4500mAh replacement pack for BK Precision 2658, 2652 and 2650 spectrum analysers with over-charge, over-discharge and short-circuit protection

  • Battery pack size1 Year
  • Details4.8
  • Exact-fit replacement for BK Precision 2658, 2652, 2650 analysers
  • 8 V, 4500 mAh Ni-MH delivers 21.6 Wh runtime
  • Built-in overcharge, over-discharge and short-circuit protection
  • ISO 9001, RoHS, CE and UN 38.3 certified for safety
  • Compact 135.4 × 33.7 × 17.18 mm pack weighs 350.4 g

Direct replacement for BK Precision analysers

This Estry 2658 pack supplies 4.8V and 4500mAh to models 2658, 2652 and 2650 Spectrum Analyzers. It matches the original BP2650 part number and delivers 21.6Wh of nickel-metal-hydride energy. The cell measures 135.4 by 33.7 by 17.18mm and weighs 350.4g.

Upgrade when the original pack no longer holds

Replace the factory battery when run-time drops below useful levels or the analyser shuts down during field use. The 4500mAh capacity restores full portable operation for the three compatible models. No higher-capacity version is offered, so users needing longer runtime must carry a spare pack.

Simple two-wire swap with built-in protection

The pack uses the same connector and pin-out as the original, so installation is a direct swap inside the battery compartment. Integrated over-charge, over-discharge, over-voltage and short-circuit circuits protect the cells. Verify the model number and BP2650 part code before fitting; other BK Precision units are not supported.

How it compares

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

Price $27.99
Pricier than about 84% 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

Will the 135.4 x 33.7 x 17.18 mm pack fit inside the battery compartment of a BK Precision 2658 spectrum analyzer?

The pack dimensions are 135.4 x 33.7 x 17.18 mm and it is built to the original equipment specifications for the 2658, 2652 and 2650 analysers, so it fits the factory compartment without modification.

What is the correct way to install the BP2650 replacement, and what common mistake should be avoided?

Power off the analyser, open the battery door, disconnect the old pack, connect the new pack observing the keyed polarity connector, close the door and charge fully before first use; the common mistake is reversing the connector.

What maintenance does the 4.8 V 4500 mAh Ni-MH pack require, and when should it be replaced?

Store at room temperature, recharge every few months if unused, avoid deep discharge; replace the pack when run-time falls well below the rated 21.6 Wh capacity.

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