Kastar 4-Pack Battery and USB Dual Charger - Long Runtime

In this review of the Kastar 4-Pack Battery and LTD2 USB Charger replacement pack, the bottom line is simple: photographers who need extended shooting time and flexible charging options will appreciate this set. It is aimed at owners of Sony cameras that use the NP-FM500H style battery and offers a straightforward way to carry spare power and charge two batteries at once from a USB source. The reviewer found the 2400mAh lithium-ion cells and the dual USB charger to be a practical, cost-effective replacement when native OEM chargers or single batteries run short during shoots.

Key Features

• Battery Capacity: Each 2400mAh lithium-ion cell provides extended run time for longer shooting sessions and fewer battery swaps.
• Dual Charging: The USB charger can charge two batteries simultaneously, which reduces downtime between shoots and keeps a pair ready.
• Switchable Plate: The charger lets users change the plate to fit different battery shapes, increasing compatibility across supported models.
• USB Power Input: With Micro-USB and Type-C input options and a 5V 2-3A 15W input, the charger works from common power banks and wall adapters for on-location charging.
• Intelligent LED: The charger uses LED indicators to show charging status and relative battery capacity so users can monitor progress without guesswork.
• Portable Design: The kit is lightweight and easy to carry, making it suitable for travel or extended field use.

Who It's For

This kit is best for hobbyist and enthusiast photographers using Sony models compatible with NP-FM500H batteries who want a convenient way to double up on power without buying multiple OEM batteries or chargers. It is particularly useful for weekend shooters, event photographers, and anyone who travels light but needs reliable spare batteries.

Photographers who require professional-grade batteries with manufacturer warranty support or those who need the absolute fastest single-battery charging may prefer to stick with original branded chargers; this pack is intended as a practical, value-minded replacement rather than an OEM-certified accessory.

Pros & Cons

Pros

• Provides four spare lithium-ion batteries at 2400mAh for significantly longer shooting time between charges.
• Dual USB charging and switchable plates add flexibility for charging on the road using power banks or USB adapters.
• LED indicators offer a clear visual of charging status and approximate battery capacity while charging.

Cons

• Charge rate per bay is modest (800mA), so full charging of large capacity cells takes time compared with some higher-power dedicated chargers.
• Not an OEM charger; those wanting manufacturer support should consider original branded options.

Specifications

Battery Type	Lithium-Ion
Battery Voltage	7.4V
Battery Capacity	2400mAh
Charger Input	5V 2-3A 15W (Micro-USB and Type-C)
Charger Output	8.4V 800mA (x1) 800mA (x2)
Simultaneous Charge	Can charge two batteries at the same time

Our Verdict

The Kastar 4-Pack and USB dual charger is a strong value for Sony camera owners who need multiple spare batteries and the flexibility to charge from USB power sources. It delivers long runtime with 2400mAh cells, useful LED charging indicators, and the convenience of simultaneous charging, making it a sensible buy for enthusiasts and travelers on a budget.

Frequently Asked Questions

Are these batteries compatible with my Sony camera?
They are made for NP-FM500H style batteries and list compatibility with many Sony Alpha and SLT models; use the product listing to confirm your exact camera model.

Can I charge two batteries at once?
Yes, the LTD2 USB dual charger can charge two batteries simultaneously at up to 800mA per bay.

What kind of USB input does the charger use?
The charger accepts Micro-USB and Type-C input and includes a Micro USB cable, allowing use with common USB power adapters and power banks.