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Four rectangular lithium-ion batteries and a compact LCD USB charger with three slots

Kastar

Kastar BT-65Q 4-pack battery & LTD2 USB charger

SKU CH-GMN3-M5XHX

Four lithium-ion batteries at 7.4 V and 5800 mAh each with a USB-powered LCD charger that handles two cells simultaneously

  • TypeBattery & Charger
  • Pack1 Charger + 4 Batteries
  • ChemicalLi-Ion
  • Capacity42.92 Wh
  • Dimensions3*2*3 Inch
  • FeaturesLCD USB Dual charger, can charge 2 batteries at the same tim
  • Compatible with Topcon BT-60Q, BT-61Q, BT-62Q, BT-65Q, BT-66Q and GMS-2 batteries
  • Works with Topcon BC-30, BC-30D and BT-30 charger models
  • 5800mAh 7.4V Li-Ion cells deliver 42.92Wh capacity for extended field use
  • LCD USB charger powers three batteries simultaneously from 5V 2A input
  • Charges via USB wall adapter, car charger or computer using included Micro USB cable

Replacement power for Topcon total stations

This pack supplies four lithium-ion batteries rated at 7.4 volts and 5800 milliampere-hours each, giving 42.92 watt-hours per cell. The included LTD2 charger accepts 5 volts 2 amps via micro-USB and can charge up to three batteries simultaneously at 8.4 volts 0.5 amps per slot. An LCD screen on the charger shows real-time charging status and remaining capacity for each bay. The set replaces Topcon BT-60Q, BT-61Q, BT-62Q, BT-65Q, BT-66Q and GMS-2 cells as well as BC-30, BC-30D and BT-30 chargers.

Field crews needing multiple hot-swappable cells

Survey teams running Topcon FC-200, FC-2200, FC-2500, GPT-7000i, GTS-750, GTS-751, GPT-7500, GTS-900, GPT-9000, GPT-9000A or robotic instruments can keep several spares cycling through the charger during long days. The USB input lets the charger run from a vehicle socket, portable power bank or laptop port without a dedicated mains adapter. Buyers who require a charger that powers four cells at once should look elsewhere because this unit handles three maximum.

Charger bay count limits simultaneous charging

The LTD2 charger provides three independent bays, so only three of the four supplied batteries can be recharged at the same time. Users who need all four cells ready in a single cycle must stagger the charge or use a second charger.

Highlights

  • Compatible with Topcon BT-60Q, BT-61Q, BT-62Q, BT-65Q, BT-66Q and GMS-2 batteries
  • Works with Topcon BC-30, BC-30D and BT-30 charger models
  • 5800mAh 7.4V Li-Ion cells deliver 42.92Wh capacity for extended field use
  • LCD USB charger powers three batteries simultaneously from 5V 2A input
  • Charges via USB wall adapter, car charger or computer using included Micro USB cable

Specifications

BrandKastar
ModelBT-65Q
Part NumberCH-LTD2-4B-BT65Q-A
TypeBattery & Charger
Pack1 Charger + 4 Batteries
ChemicalLi-Ion
Capacity42.92 Wh
Dimensions3*2*3 Inch
FeaturesLCD USB Dual charger, can charge 2 batteries at the same time

Questions about this item

How do I install the Kastar BT-65Q batteries and LTD2 charger, and what step do people often miss?

Insert each 7.4 V 5800 mAh Li-Ion pack into the Topcon total station battery compartment, then place up to three packs into the LTD2 charger slots; connect the charger via Micro USB to a 5 V 2 A source — the step many miss is using a supply that delivers the full 10 W so all three channels reach 8.4 V 0.5 A simultaneously.

What maintenance or replacement will the Kastar BT-65Q pack need later?

The four 42.92 Wh lithium-ion cells will gradually lose capacity; plan to replace the whole set when run-time on your FC-200, GTS-750 or GPT-9000 drops below useful survey duration, and keep the LTD2 charger for the new packs.

What limit appears first on the LTD2 charger during sustained use?

The charger’s 5 V 2 A input caps total power at 10 W, so when three BT-65Q batteries are charged together each channel is limited to 8.4 V 0.5 A, making input current the first bottleneck under continuous operation.

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