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Two lithium-ion batteries and a compact wall charger with foldable plug

Kastar

Kastar 2-Pack Battery & Charger for Topcon BT-65Q 5800mAh 42.92Wh

SKU CH-13S1-A4JQ1

Two 5800 mAh lithium-ion batteries and an AC wall charger with a foldable flat plug for Topcon total-station instruments

  • TypeBattery & Charger
  • Pack1 Charger + 2 Batteries
  • ChemicalLi-Ion
  • Capacity42.92 Wh
  • Dimensions3*2*2 Inch
  • FeaturesFoldable Flat Plug
  • Two 5800 mAh batteries power long survey days
  • 92 Wh lithium-ion cells deliver reliable runtime
  • 100–240 V AC input suits worldwide job sites
  • Foldable flat plug stores neatly in gear bags
  • Red-to-green LED shows charge status at a glance

Two-battery pack for Topcon survey instruments

This Kastar pack supplies two 7.4 V lithium-ion batteries rated at 5800 mAh and 42.92 Wh each. They replace the Topcon BT-65Q and compatible models used in FC and GPT series total stations. The bundle includes a single AC wall charger with a foldable flat plug for compact storage.

Charger thermals and indicators

The charger accepts AC 100–240 V at 50–60 Hz and delivers a steady DC 8.4 V at 600 mA. A red LED shows active charging while a green LED signals standby or full charge. No fan is present so operation remains silent during typical recharge cycles.

5800 mAh capacity per battery

Each cell provides 5800 mAh at 7.4 V, giving 42.92 Wh of energy for extended field sessions. Buyers needing higher capacity per cell or a multi-bay charger should look elsewhere.

Highlights

  • Two 5800 mAh batteries power long survey days
  • 92 Wh lithium-ion cells deliver reliable runtime
  • 100–240 V AC input suits worldwide job sites
  • Foldable flat plug stores neatly in gear bags
  • Red-to-green LED shows charge status at a glance

Specifications

BrandKastar
ModelBT-65Q
Part NumberNOCAR-2B-BT65Q-B
TypeBattery & Charger
Pack1 Charger + 2 Batteries
ChemicalLi-Ion
Capacity42.92 Wh
Dimensions3*2*2 Inch
FeaturesFoldable Flat Plug

Other versions of this model

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Questions about this item

How do I connect the AC wall charger and what is the common mistake with the foldable plug?

Plug the charger into a 100–240 V AC outlet, unfold the flat pins fully until they click, then insert each BT-65Q battery; the mistake is leaving the pins folded so the charger cannot make contact.

What ongoing care do the two 5800 mAh Li-Ion packs need and when should I replace them?

Store the batteries at about half charge in a cool place, recharge every few months if unused, and replace them when run-time on your Topcon total station drops noticeably below normal.

What limits the charger during a long charging session for both batteries?

The charger delivers a fixed 8.4 V 600 mA output, so each 42.92 Wh pack charges sequentially at that rate; sustained use is limited by the slow current rather than heat.

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