2400mAh NP-FM500H Battery 4-Pack with USB Dual Charger - Portable

In this review the reviewer focuses on the Kastar replacement bundle that pairs four 2400mAh lithium-ion batteries with a USB dual charger designed for Sony NP-FM500 and NP-FM500H style cells. The bottom line: this kit is best for photographers who need multiple spare batteries and a compact, flexible charging solution; the single biggest reason to buy is the combination of higher-capacity 7.4V batteries with a small, dual-slot USB charger that accepts both Micro-USB and Type-C input and shows charge status via LEDs.

Key Features

• 2400mAh capacity: Gives longer runtime per battery so users can shoot longer between swaps without carrying a power brick.
• Dual battery charging: The charger can charge two batteries at the same time, saving time on location or between sessions.
• Interchangeable plate: You can change the plate to fit different battery shapes so the charger works with multiple compatible cells.
• USB power input: The charger accepts 5V 2-3A input via Micro-USB or Type-C, making it convenient to power from power banks or USB wall adapters.
• LED status display: Intelligent LED indicators show charging status and give a quick sense of remaining battery capacity.

Who It's For

This kit is aimed at hobbyist and pro-sumer photographers who use Sony DSLR models that accept NP-FM500 or NP-FM500H battery types and who need multiple spare batteries for long shoots, travel, or time-lapse work. The higher 2400mAh capacity and dual charging make it more practical than carrying single OEM batteries when extended runtime is a priority.

Photographers who prefer original-brand chargers with dedicated AC adapters or who need manufacturer warranty coverage may want to consider official batteries and chargers instead. Also, if you require integrated AC charging with a proprietary mount rather than USB power, this USB-focused charger may be less convenient.

Pros & Cons

Pros

• High-capacity 2400mAh cells offer noticeably longer runtime than lower-capacity replacements.
• Dual-slot charging reduces downtime by allowing two batteries to charge concurrently.
• USB input plus included Micro-USB cable provides flexible charging from power banks and modern chargers.

Cons

• The kit uses a USB-powered charger rather than a dedicated AC brick, which can be slower depending on the USB source.

Specifications

Our Verdict

The 2400mAh battery 4-pack with the USB dual charger is a practical, value-oriented option for photographers who need extra runtime and the flexibility of USB charging. It combines higher-capacity replacement cells with an intelligent LED dual charger, making it a good buy for extended shoots and travel where carrying multiple spares and a compact charger matters.

Frequently Asked Questions

Will these batteries fit my camera?
They are designed as replacements for Sony NP-FM500 and NP-FM500H style batteries and are compatible with cameras that accept those models.

Can the charger charge two batteries at once?
Yes, the charger supports charging two batteries simultaneously with an output of 8.4V 800mA per slot.

What cables are included?
The kit includes a Micro-USB cable and the charger accepts both Micro-USB and Type-C input for flexible power sources.