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Two Kastar lithium-ion batteries and a compact USB charger with LCD screen

Kastar

Kastar BT-02 2-Pack Battery & LTD2 USB Charger for Zoom Q4 Q4n

SKU CH-88KE-EN0M9

Two lithium-ion batteries and a dual USB charger with LCD status for Zoom Q4 and Q4n recorders

  • Total capacity5.18 Wh
  • Pack contents1 Charger + 2 Batteries
  • Battery chemistryLi-Ion
  • Product typeBattery & Charger
  • Product dimensions5 × 3 × 2 in
  • Key featuresLCD USB Dual charger, can charge 2 batteries at the same tim
  • Two 1400 mAh Li-Ion batteries power Zoom Q4 and Q4n recorders
  • LCD USB dual charger refills both cells simultaneously from Micro-USB or Type-C
  • Intelligent LED display shows real-time charging status and remaining capacity
  • Charger accepts 5 V 2–3 A input and delivers 4.2 V 800 mA per slot
  • Interchangeable plate design supports Samsung SLB-10A, JVC BN-VH105 and Zoom BT-02 cells

Replacement power for Zoom Q4 and Q4n

This set supplies two lithium-ion batteries and a dual-slot USB charger that replaces the Zoom BT-02 cell and LBC-1 charger. Each battery delivers 3.7 V and 1400 mAh for 5.18 Wh of capacity. The kit suits videographers who need spare power for long shoots with the listed Zoom recorders.

Dual-bay charging with USB flexibility

The LTD2 charger powers both batteries simultaneously from a 5 V 2–3 A source via Micro-USB or USB-C input. An LCD panel shows charge status and remaining capacity for each bay. Output is 4.2 V at 800 mA per slot whether one or two cells are inserted.

Not for cameras outside the listed models

Buyers whose cameras use a different battery form factor or voltage cannot use this pack. The charger plates are swappable but only the models named in the compatibility list are supported.

How it compares

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

Price $11.99
Cheaper than about 75% of the 5,900 comparable items (median $17.99).

Specifications

Product
Brand nameKastar
Model nameSLB-10A
Part numberCH-LTD2-2B-SLB10A-J
Total capacity5.18 Wh
Product typeBattery & Charger
Power
Battery chemistryLi-Ion
Size & build
Product dimensions5 × 3 × 2 in
In the box
Pack contents1 Charger + 2 Batteries

Other versions of this model

5 more in the same range

Questions about this item

Does the LTD2 charger generate noticeable heat or fan noise when both batteries charge for hours?

The charger has no fan and runs silently; its 5 V 2-3 A input and 4.2 V 800 mA per-slot output produce only mild warmth during extended dual-battery sessions.

What power source must I already have to run the LTD2 charger?

Any USB port or adapter that can deliver 5 V at 2-3 A, such as a standard 15 W phone charger or a powered USB hub with Micro-USB or Type-C output.

Will the SLB-10A batteries communicate correctly with my Zoom Q4n so the recorder shows accurate remaining capacity?

Yes, the 3.7 V 1400 mAh cells are direct replacements for the Zoom BT-02 and work with the Q4n fuel gauge without modification.

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