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Black rectangular lithium-ion battery pack with smooth finish

NShi

NShi BT-L2 4200mAh 7.4V Li-ion battery

SKU CH-WADP-ZP3PB

7.4 V 4200 mAh lithium-ion replacement battery for Topcon ES and OS Total Station models including ES-602, ES-605 and Hiper II receivers

  • Battery TypeLithium Polymer
  • Reliable power for Topcon ES and OS Total Stations
  • 4200 mAh capacity supports extended field sessions
  • 4 V lithium-ion chemistry with no memory effect
  • Triple ROSH, CE and UL certification ensures safety
  • Compact 70.66 × 38.52 × 39.00 mm design fits original battery bay

Direct replacement for Topcon survey instruments

The NShi BT-L2 is a 7.4 V 4200 mAh lithium-ion pack built to match the original battery in voltage, capacity and physical layout. It fits Topcon ES and OS total stations including the ES-602, ES-602G, ES-600G, ES-605G, OS-602G and OS-605G models as well as Hiper II and HiPer V GNSS receivers. The cell chemistry is lithium polymer with no memory effect.

Certified safety and rugged daily use

The pack carries ROSH, CE and UL certifications and integrates over-charge, over-discharge, over-heat, over-current and short-circuit protection. At 189.4 g it sits securely in the instrument’s battery compartment and the 70.66 × 38.52 × 39.00 mm footprint aligns with the original latch points. Charging can be performed at any state of charge without degrading cycle life.

Upgrade from depleted or ageing OEM cells

Survey crews replacing a BT-L2 that no longer holds a full day’s charge will regain the rated 31.08 Wh capacity. The jump is worth it when field sessions run longer than the old pack can sustain or when the original battery shows swelling or voltage sag under load. It is not suited for instruments that require a different voltage or form factor.

Highlights

  • Reliable power for Topcon ES and OS Total Stations
  • 4200 mAh capacity supports extended field sessions
  • 4 V lithium-ion chemistry with no memory effect
  • Triple ROSH, CE and UL certification ensures safety
  • Compact 70.66 × 38.52 × 39.00 mm design fits original battery bay

Specifications

Battery TypeLithium Polymer

Questions about this item

What voltage and capacity does the BT-L2 4200mAh battery deliver?

The pack supplies 7.4 volts and 4200 milliampere-hours, rated at 31.08 watt-hours.

Will the 70.66 x 38.52 x 39.00 millimetre case fit my Topcon ES-602 total station?

Yes, the dimensions match the original BT-L2 casing so it seats directly in the ES-602, ES-605G and HiPer II receivers.

How do I install the battery and what step is often missed?

Slide the pack into the compartment until the latch clicks, then charge fully before first use to calibrate the fuel gauge.

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