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Kastar BT-65Q 5800mAh Li-Ion battery with LTD2 USB charger

Kastar

Kastar BT-65Q Li-Ion 5800mAh battery with LTD2 USB charger

SKU CH-ECWN-M1BB1

Lithium-ion 7.4 V 5800 mAh pack with an LCD USB charger that powers up to three batteries from any 5 V 2 A source

  • Total capacity42.92 Wh
  • Pack contents1 Charger + 1 Battery
  • Battery chemistryLi-Ion
  • Product typeBattery & Charger
  • Product dimensions3 × 2 × 2 in
  • Key featuresLCD USB Dual charger, can charge 2 batteries at the same tim

Configuration 1 Charger + 1 Battery

  • 5800 mAh Li-Ion cell powers Topcon total stations through long field days
  • 92 Wh capacity supports extended survey sessions without frequent swaps
  • LCD USB charger shows real-time charge status and remaining capacity
  • Dual-bay charger replenishes two batteries simultaneously from any 5 V USB source
  • Compatible with BT-60Q, BT-61Q, BT-62Q, BT-65Q, BT-66Q and GMS-2 batteries

Kastar BT-65Q replacement battery kit

This kit provides a 5800mAh lithium-ion cell rated at 7.4V and 42.92Wh alongside an LCD USB charger. It is built for surveyors and field crews who operate Topcon total stations such as the GTS-750, GTS-751, GPT-7500 or GTS-900 series and need reliable power for long days on site.

Upgrade from depleted or lost original packs

The cell replaces Topcon BT-60Q, BT-61Q, BT-62Q, BT-65Q and BT-66Q batteries and works with BC-30, BC-30D or BT-30 chargers. The jump is worth it when existing packs no longer hold a full day’s charge or when a spare was never purchased for a second instrument like the FC-200, FC-2200 or FC-2500.

USB-powered charger fits in a field bag

The charger runs from any 5V 2A USB source — wall adapter, vehicle socket or laptop — and delivers 8.4V 0.5A to each bay. Its LCD shows status and capacity for up to three cells at once, freeing you from carrying a dedicated AC mains unit while keeping the GPT-7000i, GPT-9000 or robotic stations powered.

How it compares

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

Price $28.99
Pricier than about 76% of the 5,900 comparable items (median $17.99).

Specifications

Product
Brand nameKastar
Model nameBT-65Q
Part numberCH-LTD2-1B-BT65Q-B
Total capacity42.92 Wh
Product typeBattery & Charger
Power
Battery chemistryLi-Ion
Size & build
Product dimensions3 × 2 × 2 in
In the box
Pack contents1 Charger + 1 Battery

Other versions of this model

2 more in the same range

Questions about this item

Will the 3×2×2 inch BT-65Q pack fit my Topcon GTS-900 battery compartment?

The BT-65Q measures 3×2×2 inches and replaces Topcon BT-60Q through BT-66Q packs used in the GTS-900 and other listed total stations.

How do I charge the 5800 mAh pack with the LTD2 unit, and what step is often missed?

Connect the charger via Micro-USB to a 5 V 2 A source; the LCD shows each 8.4 V 0.5 A channel, but users forget to seat all three batteries for simultaneous charging.

When should I replace the 42.92 Wh lithium-ion cell in my FC-2500 kit?

Replace the 7.4 V 5800 mAh cell when run-time drops noticeably or the LCD charger reports reduced capacity after repeated cycles.

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