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Rectangular Ni-MH battery pack 166.5 by 61.9 by 24.26 mm weighing 520.0 g with 7.2 V 3500 mAh rating

Estry

Estry DTM-350 7.2V 3500mAh standard battery

SKU CH-WTZK-V86B9 MPN DTM-350

Ni-MH replacement battery for survey total stations, 7.2 V 3500 mAh with BC-65 fit and safety certifications

  • Battery pack size1 Year
  • Details7.2
  • Replaces original NK total-station batteries with exact-fit design
  • 2V 3500mAh Ni-MH chemistry delivers 25.2Wh for extended field sessions
  • Built-in overcharge, over-discharge, over-voltage and short-circuit protection safeguards equipment
  • Certified to ISO9001, RoHS, CE, UN38.3 and MSDS standards
  • Compact 166.5 x 61.9 x 24.26mm pack weighs 520.0g for easy transport

Replacement Battery for Total Stations

The Estry DTM-350 is a 7.2V 3500mAh nickel-metal hydride pack built to match the original specifications for a wide range of surveying instruments. It serves as a direct replacement for the BC-65 part number used across multiple total station models. Survey crews and field engineers can swap it in without adapters or modifications.

Durable Build with Safety Protections

The pack measures 166.5 x 61.9 x 24.26mm and weighs 520.0g, fitting the existing battery compartment exactly. Integrated circuitry guards against overcharge, over-discharge, over-voltage and short circuits to extend service life. Certifications include ISO9001, RoHS, CE, UN38.3 and MSDS for regulatory compliance.

Upgrade from Lower-Capacity Packs

This 25.2Wh unit replaces older 3000mAh packs to deliver longer runtime between charges during extended field sessions. The jump is worth it when daily operation demands more hours than the original capacity provides. It is not suited for users needing lithium-ion chemistry or higher voltage platforms.

How it compares

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

Price $50.99
Pricier than about 90% of the 10,440 comparable items (median $10.99).

Specifications

Product
Brand nameNi-MH
Model name3,000 mAh
In the box
Battery pack size1 Year

Questions about this item

What voltage and capacity does the 7.2V Ni-MH pack deliver to a DTM-350 total station?

The pack supplies 7.2V and 3500mAh, giving 25.2Wh of energy for compatible Nikon and Sokkia total stations.

Will the 166.5 x 61.9 x 24.26mm case fit the BC-65 battery compartment on my DTM-332?

Yes, the dimensions match the original BC-65 form factor so it slides into the DTM-332 and all other listed models without modification.

How do I install the replacement pack and what step do users often miss?

Power off the instrument, slide the pack into the battery cavity until the latch clicks, then run a full charge cycle before first field use.

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