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Four rectangular lithium-ion batteries and a compact dual-slot USB charger with LCD screen

Kastar

Kastar NP-F550/F570 4-Pack Battery & LTD2 USB Charger

SKU CH-KWNH-T2H44

Four 7.4 V lithium-ion batteries with a dual-slot USB charger that powers two cells at once

  • Total capacity21 Wh
  • Pack contents1 Charger + 4 Batteries
  • Battery chemistryLi-Ion
  • Product typeBattery & Charger
  • Product dimensions5 × 3 × 3 in
  • Key featuresLCD USB Dual charger, can charge 2 batteries at the same tim
  • Four 2900 mAh Li-ion packs keep cameras running longer
  • Dual-slot LCD charger powers two batteries simultaneously
  • Micro-USB and USB-C inputs accept common cables
  • 4 V 21 Wh cells replace Sony NP-F550/F570 models
  • Compact 5×3×3 in kit fits in any gear bag

Four-Battery Pack with Dual USB Charger

This set includes four lithium-ion NP-F550/F570 batteries and an LTD2 charger that powers two cells simultaneously. It targets videographers and photographers who need extended run-time for compatible Sony Handycam and Cyber-shot models without carrying a wall adapter.

Swappable Plates and Dual-Port Input

The charger accepts interchangeable plates so it can handle other NP-F series packs beyond the four supplied. Micro-USB and USB-C inputs let you recharge from power banks, laptop ports or any 5 V 2–3 A source while the LCD shows each battery’s status and capacity.

7.4 V Output Limits On-Camera Use

Each cell delivers 7.4 V at 2900 mAh for 21 Wh total energy, so runtime depends on the camera’s draw and cannot be extended by the charger alone. The charger outputs 8.4 V at 800 mA per slot, meaning a full recharge cycle takes several hours and cannot keep pace with continuous high-drain recording.

How it compares

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

Price $30.99
Pricier than about 79% of the 5,900 comparable items (median $17.99).

Specifications

Product
Brand nameKastar
Model nameNP-F550 NP-F570
Part numberCH-LTD2-4B-F570-V
Total capacity21 Wh
Product typeBattery & Charger
Power
Battery chemistryLi-Ion
Size & build
Product dimensions5 × 3 × 3 in
In the box
Pack contents1 Charger + 4 Batteries

Other versions of this model

5 more in the same range

Questions about this item

How often will the NP-F550/F570 lithium-ion cells need replacement after repeated charge cycles?

Lithium-ion chemistry typically delivers several hundred full cycles before noticeable capacity loss; with four 21 Wh batteries in rotation you can spread wear and extend the interval between replacements.

What limits continuous operation when both batteries are charging at 800 mA each?

The LTD2 charger outputs 8.4 V at 800 mA per slot, so simultaneous dual charging is capped at that current; total input draws 5 V at 2–3 A (15 W) from either Micro-USB or Type-C.

How much heat and fan noise does the dual charger produce during all-day use?

The charger has no fan; it relies on passive dissipation while delivering 800 mA per channel, so operation is silent and warmth stays low under the 15 W input rating.

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