Kastar 4-Pack NP-FM50 Battery and LTD2 USB Charger - Reliable Power

Our review of the Kastar 4-Pack NP-FM50 Battery and LTD2 USB Charger finds it best suited for photographers and videographers who still use older Sony camcorders and need dependable, portable power. The single biggest reason to buy is the practical combination of four 2300mAh Lithium-Ion batteries and a dual USB charger that can charge two cells at once, which removes the worry of running out of power on location. It is compact enough to carry in a kit bag and offers flexible USB input options for field charging.

Key Features

• Battery Capacity: The 2300mAh cells provide extended runtime compared with many original batteries, helping shoots last longer between swaps.
• Battery Voltage: At 7.4V the batteries match the original specifications for NP-FM50 compatible cameras, ensuring reliable power delivery.
• Dual Charging: The LTD2 charger charges two batteries at the same time and displays status with intelligent LEDs to simplify monitoring.
• Multiple Inputs: Micro-USB and Type-C input support give flexible charging from a power bank, laptop, or wall adapter when 5V USB power is all that is available.
• Interchangeable Plate: The charger plate can be changed to accept different battery types, adding convenience for mixed-battery workflows.
• Portable Power: The small charger and four spare batteries make it straightforward to keep spare power in a camera bag without significant bulk.

Who It's For

The kit is ideal for owners of legacy Sony camcorders and some DSLR or compact models that list NP-FM50 or related models as compatible, who need a set of spare batteries and a modern USB-charging option. It suits event shooters, travel videographers, and hobbyists who value longer run times and the ability to charge from power banks on the go.

Photographers who require factory-certified OEM parts for professional warranty or service reasons should look elsewhere, and those who need ultra-fast charging beyond the charger00mA per channel output or specialized battery management features may prefer higher-end systems.

Pros & Cons

Pros

• Four 2300mAh batteries deliver extended runtime compared with many originals.
• The LTD2 dual USB charger can top two batteries simultaneously and shows charge status with LEDs.
• Micro-USB and Type-C inputs increase charging flexibility when using power banks or USB adapters.
• Interchangeable plate design adds compatibility with multiple battery plates.

Cons

• The charger00mA per channel output is not the fastest option for users who need very rapid recharge cycles.
• Not an OEM Sony accessory, so those needing original manufacturer accessories may prefer an official charger.

Specifications

Battery Type	Lithium-Ion
Battery Voltage	7.4V
Battery Capacity	2300mAh (each)
Charger Input	5V 2-3A (USB) 15W
Charger Output	8.4V 800mA x1 or 800mA x2
Charge Ports	Dual USB with Micro-USB and Type-C input

Our Verdict

The Kastar 4-Pack NP-FM50 Battery and LTD2 USB Charger is a practical, value-oriented kit for owners of compatible Sony cameras who need multiple spare batteries and flexible USB charging. Its combination of four 2300mAh cells and a dual LED USB charger offers dependable runtime and convenient field charging, making it a sensible buy for enthusiasts and working shooters who want reliable extended power without heavy investment.

Frequently Asked Questions

Are these batteries compatible with NP-FM50 cameras?
Yes, the pack is compatible with NP-FM50 and several related Sony battery models listed in the product description.

Can the charger charge two batteries at once from a power bank?
Yes, the LTD2 charger supports charging two batteries simultaneously and accepts Micro-USB or Type-C input from USB power sources.

Does the kit include a USB cable?
Yes, the kit comes with a Micro-USB cable for charging; Type-C input is supported on the charger as well.