3000mAh Replacement Total Station Batteries For Topcon Cygnus KS-102

Place of Origin China
Brand Name Topcon
Certification ISO CE
Model Number BT-77Q
Minimum Order Quantity 5 Pieces
Packaging Details Box and Carton
Delivery Time 3-5 work day
Payment Terms T/T
Supply Ability 1000 pieces per month
Product Details
Voltage 7.4V Capacity 3000mAh
Type Li-lon Size 155*80*37 (mm)
Weight 230g Charger BC-L1
Temperature 10~40 °C Condition New
Color Grey Used For Topcon Total Station
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3000mAh Replacement Total Station Batteries


7.4V Replacement Total Station Batteries


ISO Li lon Total Station Batteries

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Product Description

Battery for Topcon Cygnus KS-102 Total Station Replacement for P/N BT-77Q

Model: BT-77Q



Voltage 7.4V
Dimension 155*80*37 (mm)
Type Li-lon
Capacity 3000mAh
Weight 230g
Package Individual Box Package
Warranty 12 Months
Temperature 10~40 °C
Charger BC-L1
Rechargeable Yes
Used For TOPCON KS-102 Total Station




The Leosurvey BT-77Q Rechargeable Li-Ion Battery works with the Cygnus KS-102 Total Station and provides up to 23 hours of operation when measuring distances and angles and approximately 50 hours when measuring angles only. This rechargeable 3,000 mAh Li-ion battery has an output voltage of 7.4 and weighs 0.5 lbs.



  • Compatible with the obsolete Cygnus KS-102 total station
  • Up to 23-hour battery life when measuring distances and angles
  • Approximately 50-hour operating time when measuring angles only
  • 7.4 Output voltage
  • Weighs 0.5 lbs (0.2 kg)


The new battery needs to be recharged 3-4 times and charged for 6-8 hours to fully activate the battery for the best performance.
If you have any issues about batteries, please to be free contact us.


Battery Life

The life of batteries is primarily defined by the following factors:

• Electrical loading

• Charging method

• Temperatures on charging, discharging and storage

• Quality of the cells Losses in capacity caused by incorrect charging are practically excluded with the Leosurvey chargers which have special switch off criteria to protect the battery. Reduction in battery capacity is normally due to age. However it can also be the result of storage at excessively low or high temperatures.


Protecting the environment/disposal

For reasons of environmental protection and safety, used or defective batteries must not be thrown away. They must be correctly disposed of in a discharged state. Follow the national regulations on disposal.


Safety/precautionary measures

For the safe usage of batteries, please refer to the section on safety in the User Manual supplied with the products.

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