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Rectangular lithium-ion battery pack, dark plastic casing, two-pin connector visible

Cameron Sino BT-L2 4200mAh 7.4V lithium-ion battery

SKU CH-XVNY-6TZER

A 4200 mAh 7.4 V lithium-ion replacement battery for Topcon ES, OS and HiPer survey instruments

  • Battery pack size70.66 × 38.52 × 39
  • Battery typeLithium ion
  • Battery capacity4,200 mAh
  • Battery voltage rating7.4 V
  • Details70.66 × 38.52 × 39
  • Product typeLithium ion
  • Longer field sessions with 4200 mAh capacity
  • Reliable 7.4 V output for survey instruments
  • Direct fit for Topcon ES and HiPer series
  • Compact 70.66 x 38.52 x 39.00 mm form factor
  • ISO9001, RoHS and CE certified quality

Compatible replacement for Topcon survey instruments

The Cameron Sino BT-L2 lithium-ion battery delivers 4200mAh at 7.4 volts for Topcon ES Total Station, ES-600G, ES-602, ES-602G, ES-605, ES-605G, Hiper II, HiPer II Receivers, HiPer V GNSS Receivers, OS Total Station, OS-602G and OS-605G models. A fully decoded chip ensures the pack communicates with the instrument exactly like the original part.

Stable output in field conditions

The 31.08Wh cell maintains consistent voltage across long survey sessions without the self-discharge issues common in aged packs. Lithium-ion chemistry avoids memory effect, so partial top-ups between jobs do not reduce usable capacity. The 189.4g pack adds negligible weight to the instrument.

Direct swap for depleted Topcon BT-L2 packs

This unit replaces an exhausted original battery when runtime has fallen below a full day of measurements. It is not suited for instruments that require a different voltage, connector pin-out or physical footprint. Buyers needing higher capacity for multi-day campaigns without recharging should verify whether their instrument supports extended packs before purchasing.

How it compares

Measured against everything we stock in Alkaline & Coin Cell Batteries, at today’s prices. Recalculated every night.

Price $27.99
Pricier than about 63% of the 190 comparable items (median $18.49).

Specifications

Product
Brand nameCameron Sino
Model nameES Total Station, ES-600G, ES-602, ES-602G, ES-605, ES-605G, Hiper II, HiPer II Receivers, HiPer V GNSS Receivers, OS Total Station, OS-602G, OS-605G
Part numberBT-L2
Product typeLithium ion
Power
Battery typeLithium ion
Battery capacity4,200 mAh
Battery voltage rating7.4 V
In the box
Battery pack size70.66 × 38.52 × 39

Questions about this item

How do I install the Cameron Sino BT-L2 battery in my Topcon ES-602G total station and what step do people often miss?

Slide the pack into the battery compartment until the connector clicks fully into the socket; the step many miss is verifying that the decoded chip contacts seat completely so the instrument recognises the 7.4 V 4200 mAh pack.

What maintenance will the BT-L2 lithium-ion pack need over its service life?

Run two or three full charge and discharge cycles when new to calibrate the fuel gauge, then store at room temperature below 60 °C and avoid low-quality third-party chargers to preserve the 31.08 Wh capacity.

What is the first limit I will hit when using the BT-L2 continuously in a HiPer V GNSS receiver?

The 4200 mAh capacity at 7.4 V delivers 31.08 Wh, so runtime ends when that energy is depleted; heat buildup above 60 °C can also trigger protection before the pack is fully discharged.

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