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

Kastar

Kastar BT-02 3-Pack Battery & AC Charger for Zoom Q4 Q4n

SKU CH-RCJ8-MB93P

Three lithium-ion batteries and a foldable AC charger power Zoom Q4 and Q4n recorders

  • Total capacity5.18 Wh
  • Pack contents1 Charger + 3 Batteries
  • Battery chemistryLi-Ion
  • Product typeBattery & Charger
  • Product dimensions3 × 2 × 3 in
  • Key featuresFoldable Flat Plug
  • Three spare batteries keep your Zoom Q4 recording longer
  • 1400 mAh lithium-ion cells deliver 5.18 Wh each
  • Foldable flat-pin charger fits tight outlets and bags
  • 100–240 V input works worldwide without a converter
  • LED shows red while charging and green when full

Ready-to-use power kit

This Kastar bundle supplies three BT-02 replacement batteries and one AC wall charger for Zoom Q4 and Q4n Handy Video Recorders. Each cell delivers 3.7 V and 1400 mAh for a total of 5.18 Wh. The charger accepts 100–240 V input at 50–60 Hz and outputs 4.2 V at 600 mA. A foldable flat plug keeps the unit compact for travel.

Replaces Zoom originals

The pack stands in for the Zoom BT-02 battery (part 247-9036) and the Zoom LBC-1 charger. Swapping to this kit is worth it when the original cells no longer hold a full charge or when a spare charger is needed for a second location. Videographers who record long sessions gain extra run-time without hunting for proprietary replacements.

Steady output for long takes

Under continuous recording the lithium-ion cells maintain a stable voltage until the charger LED shifts from red to green. The 600 mA charge rate refills each battery in a predictable cycle rather than a quick burst. Users who need reliable power for interviews or events will find the performance consistent across all three units.

How it compares

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

Price $10.99
Cheaper than about 80% of the 5,900 comparable items (median $17.99).

Specifications

Product
Brand nameKastar
Model nameSLB-10A
Part numberNOCAR-3B-SLB10A-J
Total capacity5.18 Wh
Product typeBattery & Charger
Power
Battery chemistryLi-Ion
Size & build
Product dimensions3 × 2 × 3 in
In the box
Pack contents1 Charger + 3 Batteries

Other versions of this model

5 more in the same range

Questions about this item

What voltage and capacity does each BT-02 replacement battery provide?

Each battery delivers 3.7 V and 1400 mAh, giving 5.18 Wh of energy.

What input range and output does the wall charger accept and supply?

The charger takes AC 100–240 V at 50–60 Hz and outputs DC 4.2 V at 600 mA.

How many charge cycles can the lithium-ion cells typically sustain before capacity drops?

Lithium-ion cells of this type generally last several hundred full cycles before noticeable capacity loss.

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