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Four rectangular black lithium-ion batteries side by side

Kastar

Kastar 4-Pack BT-65Q Li-Ion 7.4V 5800mAh Battery

SKU CH-66WM-6M7D7

Four-pack of 7.4 V 5800 mAh lithium-ion batteries for Topcon total stations and compatible chargers

  • Total capacity42.92 Wh
  • Pack contents4 Batteries
  • Battery chemistryLi-Ion
  • Product typeBattery
  • Product dimensions3 × 2 × 3 in
  • Key featuresHigh Capacity and Manufacture Price.
  • High-capacity 5800 mAh Li-Ion cells extend field runtime
  • Built-in protection circuit guards against over-charge, over-discharge, over-voltage, over-current and over-heating
  • UL1642 and CE certified cells ensure safe replacement for Topcon instruments
  • Four-battery pack keeps multiple total stations powered without downtime
  • Compatible with Topcon BT-60Q, BT-61Q, BT-62Q, BT-65Q, BT-66Q and GMS-2 batteries

Four-pack Li-ion survey batteries

This pack contains four Kastar BT-65Q lithium-ion batteries rated at 7.4V and 5800mAh each. They replace Topcon BT-60Q, BT-61Q, BT-62Q, BT-65Q, BT-66Q and GMS-2 cells. Survey crews using Topcon total stations gain a ready supply of spare power for extended field sessions.

Compatibility with chargers and instruments

The cells work with Topcon BC-30, BC-30D and BT-30 chargers. They also power Topcon FC-200, FC-2200, FC-2500, GPT-7000i, GTS-750, GTS-751, GPT-7500, GTS-900, GTS-900A, GPT-9000 and GPT-9000A total stations including robotic models. This broad fit reduces the number of battery types a team must stock.

Built-in protection circuits

Each battery includes over-charge, over-discharge, over-voltage, over-current and over-heating safeguards and meets UL1642 and CE safety standards. The protection helps prevent damage during long charging cycles or heavy discharge in the field. Buyers who need a higher capacity than 5800mAh or a different voltage will need another solution.

How it compares

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

Price $86.99
Pricier than about 90% of the 5,900 comparable items (median $17.99).

Specifications

Product
Brand nameKastar
Model nameBT-65Q
Part numberBA-4B-BT65Q-B
Total capacity42.92 Wh
Product typeBattery
Power
Battery chemistryLi-Ion
Size & build
Product dimensions3 × 2 × 3 in
In the box
Pack contents4 Batteries

Other versions of this model

5 more in the same range

Questions about this item

How often should the BT-65Q pack be cycled to maintain its 5800 mAh capacity?

Lithium-ion cells like these do not require scheduled deep cycles; partial charges are fine and the built-in protection circuit guards against over-discharge.

What stops the BT-65Q from delivering full current during a long survey session?

The over-heating protection circuit will cut output if the cell temperature rises beyond its safe limit during continuous use.

Does the BT-65Q get hot when powering a GTS-900 all day?

The pack includes over-heating protection, so it will shut down before reaching unsafe temperatures during extended operation.

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