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Rectangular nickel-metal hydride battery pack, dark casing, labelled 7.2V 3500mAh

Estry

Estry DTM-400 standard battery 7.2V 3500mAh 25.2Wh

SKU CH-RN7Z-9T92C MPN DTM-400

Ni-MH replacement battery delivering 7.2V and 3500mAh for Trimble and NK total stations including DTM-400, TS 415 and TS 515 models

  • Specifications7.2
  • Battery Pack1 Year
  • Direct replacement for Trimble and NK total stations
  • 2 V 3500 mAh 25.2 Wh capacity for long field sessions
  • Overcharge, over-discharge, over-voltage and short-circuit protection built in
  • ISO9001, RoHS, CE, UN38.3 and MSDS certified for safety and quality
  • Compact 135.9 x 51.45 x 18.0 mm pack weighing 441.0 g

Replacement battery for survey total stations

The Estry DTM-400 is a nickel-metal hydride pack rated at 7.2 volts and 3500 milliampere-hours delivering 25.2 watt-hours. It fits Trimble TS series instruments including the TS 255 TS 400 TS 415 and TS 515 plus Sokkia DTM and NPL models. The pack measures 135.9 by 51.45 by 18.0 millimetres and weighs 441.0 grams.

Direct substitute for BC-60 and BC-65 packs

This unit replaces original part numbers BC-60 and BC-65 as well as the 4/UR17650/3500 cell assembly. The upgrade is worthwhile when the original pack no longer holds a full day charge or shows reduced runtime in cold conditions. Built-in protection guards against overcharge over-discharge over-voltage and short circuits.

Ni-MH chemistry limits runtime and charge speed

Nickel-metal hydride chemistry self-discharges faster than lithium alternatives so packs stored for weeks need a top-up before field use. Capacity drops noticeably below freezing so winter surveys benefit from keeping a spare warm. The 25.2 watt-hour rating restricts air-transport classification but meets UN38.3 safety testing.

Highlights

  • Direct replacement for Trimble and NK total stations
  • 2 V 3500 mAh 25.2 Wh capacity for long field sessions
  • Overcharge, over-discharge, over-voltage and short-circuit protection built in
  • ISO9001, RoHS, CE, UN38.3 and MSDS certified for safety and quality
  • Compact 135.9 x 51.45 x 18.0 mm pack weighing 441.0 g

Specifications

BrandNi-MH
Model3000mAh
Specifications7.2
Battery Pack1 Year

Questions about this item

What are the exact dimensions of the DTM-400 battery pack for fitting into my total station?

The pack measures 135.9 mm by 51.45 mm by 18.0 mm and weighs 441.0 g. Check the battery compartment of your Trimble TS 400 or DTM-322 against those figures before ordering.

How is the battery installed and what step is often missed?

Slide the pack into the compartment until the latch clicks, then verify the 7.2 V label faces outward. The step users skip is confirming the BC-65 or 4/UR17650/3500 part number matches the original sticker.

When will the Ni-MH pack need replacement and what should I watch for?

Expect gradual runtime loss after several hundred charge cycles. Replace the pack when a full charge no longer powers your TS 415 or NPL-350 through a normal field day, or if the case shows swelling.

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