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Four NP-FM500H batteries and a compact LTD2 dual USB charger with LCD status display

Kastar

Kastar NP-FM500H 4-Pack Battery & LTD2 USB Charger for Sony A850 A900 A57 A58

SKU CH-WM4X-KZ3GW

Four 2400 mAh lithium-ion batteries with a dual-slot USB charger that powers two cells at once from Micro-USB or Type-C

  • TypeBattery & Charger
  • Pack1 Charger + 4 Batteries
  • ChemicalLi-Ion
  • Capacity7.76 Wh
  • Dimensions5*3*3 Inch
  • FeaturesLCD USB Dual charger, can charge 2 batteries at the same tim
  • Four 2400 mAh Li-Ion batteries power Sony Alpha models
  • Dual-bay USB charger fills two packs simultaneously
  • Micro-USB and Type-C inputs accept common cables
  • LCD screen shows real-time charge level per battery
  • 5 V 2–3 A input keeps the kit travel-ready

Four-battery set with dual USB charger

This pack supplies four 7.4 V lithium-ion cells rated at 2400 mAh and 7.76 Wh each, plus an LTD2 charger that can handle two batteries at once. The charger accepts 5 V 2-3 A input through Micro-USB or Type-C and delivers 8.4 V at 800 mA per slot. An LCD panel shows charge status and capacity for each cell. Everything is new and ready for Sony Alpha and DSLR bodies.

For photographers using compatible Sony models

Shooters with DSLR-A850, DSLR-A900, SLT-A57, SLT-A58 and the other listed Alpha cameras gain a spare power pool for long sessions. The dual-slot charger lets two packs replenish together from any USB power source. Users who need an AC wall adapter in the box or who shoot with cameras outside the listed compatibility list should look elsewhere.

7.4 V 2400 mAh lithium-ion chemistry

Each battery matches the NP-FM500H form factor and voltage, so it fits the same compartment and works with the original BC-VM10 or AC-SQ950 chargers. The 7.76 Wh rating stays within common air-travel limits for carry-on spares. Confirm your camera model appears in the compatibility list before purchasing.

Highlights

  • Four 2400 mAh Li-Ion batteries power Sony Alpha models
  • Dual-bay USB charger fills two packs simultaneously
  • Micro-USB and Type-C inputs accept common cables
  • LCD screen shows real-time charge level per battery
  • 5 V 2–3 A input keeps the kit travel-ready

Specifications

BrandKastar
ModelNP-FM500H
Part NumberCH-LTD2-4B-FM500H-I
TypeBattery & Charger
Pack1 Charger + 4 Batteries
ChemicalLi-Ion
Capacity7.76 Wh
Dimensions5*3*3 Inch
FeaturesLCD USB Dual charger, can charge 2 batteries at the same time

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Questions about this item

How do I install the Kastar NP-FM500H batteries and LTD2 charger correctly, and what step do people often miss?

Insert each 7.4 V 2400 mAh battery into the LTD2 dual-slot charger, connect the supplied Micro-USB cable to a 5 V 2-3 A 15 W USB power source via Micro-USB or Type-C, and watch the LCD for charging status; the step many miss is using a charger that delivers the full 15 W, otherwise the 800 mA per slot rate drops and charge time lengthens.

What maintenance or replacement will the Kastar NP-FM500H batteries need over time?

Lithium-ion cells lose capacity with each cycle; expect to replace the four NP-FM500H packs when run-time falls below your shooting needs — typically after 300-500 full charge cycles — and keep contacts clean with a dry cloth; the LTD2 charger itself has no user-serviceable parts.

What limit appears first when using the LTD2 charger continuously for multiple battery cycles?

The charger outputs 8.4 V at 800 mA per slot, so two batteries charge at once; sustained back-to-back cycles are limited by the 15 W input ceiling — if the USB source cannot maintain 5 V at 3 A, current throttles and each 7.76 Wh cell takes longer than the nominal charge window.

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