BM Premium 4 NP-FZ100 Batteries for Sony Alpha Series - Long Recording

In this review the BM Premium 4 NP-FZ100 battery pack is evaluated for photographers and videographers who rely on Sony Alpha bodies for long shoots. The bottom line: these four Li-ion replacement batteries deliver a useful capacity of 2280mAh each with a fully decoded chip that reports remaining time just like an original cell, making them a practical, lower-cost way to extend runtime for cameras such as the a7 III, a7R IV, a7S III, a9 series, FX3 and ZV-E1. For those needing uninterrupted recording and accurate battery readout, this pack is worth considering.

Key Features

• 2280mAh capacity: Each battery gives extended runtime for long shoots and reduces the need to swap cells frequently during events or interviews.
• Fully decoded chip: The batteries communicate remaining charge to the camera so users see time left without requiring a special charger or adapter.
• Multi-circuit protection: Over-charge, short-circuit, high-temperature and surge safeguards protect the camera and battery during heavy use.
• Fire-resistant construction: High-quality materials minimize thermal risk and improve durability during everyday field use.
• Memory-free Li-ion chemistry: No memory effect means batteries can be topped up at any time without degrading performance.
• One-year warranty: A full year of coverage gives buyers added confidence in the replacement pack.

Who It's For

These batteries are best for Sony Alpha users who need multiple spare cells for extended shooting days: wedding photographers, run-and-gun videographers, and content creators using models like the a7 IV, a7C II, FX30, or a6600. The pack is particularly useful when a camera must stay powered for long takes or when swapping batteries mid-shoot is inconvenient.

Casual users who only shoot briefly or those who prefer OEM cells and direct manufacturer support may look elsewhere; if precise factory service or manufacturer-branded packaging is a priority, official batteries might be preferable despite higher cost.

Pros & Cons

Pros

• Accurate charge reporting thanks to the fully decoded chip that mimics original battery behavior.
• Good per-cell capacity at 2280mAh, supporting longer recording and fewer battery changes.
• Built-in safety features and fire-resistant construction reduce operational risk during extended use.
• One-year warranty provides reasonable protection against defects out of the box.

Cons

• Not an OEM cell, so users preferring brand-original batteries may have concerns about long-term durability.
• Some professional workflows that require manufacturer direct support might opt for official replacements instead.

Specifications

Our Verdict

The BM Premium 4 NP-FZ100 battery pack is a cost-effective way to add reliable runtime for a broad range of Sony Alpha cameras, offering accurate charge reporting and built-in safety protections. It represents good value for photographers and videographers who need multiple spare batteries for long days on set, while users who insist on OEM parts or manufacturer-only support may prefer official batteries despite the higher price.

Frequently Asked Questions

Will these batteries show remaining time in my Sony camera?
Yes, the pack uses a fully decoded chip so the camera reports remaining time just like with an original battery.

Are these batteries safe for continuous recording?
They include multiple circuit protections and fire-resistant construction to reduce risk during extended recording sessions.

Do I need a special charger for these cells?
No special charger is required; they are compatible with standard chargers and behave like original NP-FZ100 batteries.