Kastar 4-Pack Battery and LTD2 USB Charger Replacement for Phase One

Our review tests the Kastar 4-Pack Battery and LTD2 USB Charger Replacement for Phase One systems to see if it can be a practical backup power solution for medium-format camera users. The bottom line: this kit is for photographers who need multiple spare batteries and a flexible, portable charger that can handle two batteries at once and switch plates to fit different packs. It impressed by delivering a compact, dual-bay USB charger with intelligent LED status and a set of four 2400mAh lithium-ion cells that match common Phase One battery voltages, making it a solid choice for field shoots where swapping batteries quickly matters.

Key Features

• Battery type: The included lithium-ion batteries provide a standard 7.4V and 2400mAh capacity to keep medium-format backs running through long sessions.
• Dual charging: The LTD2 charger can charge two batteries simultaneously, which reduces downtime when you have multiple spares to top up between shoots.
• Interchangeable plates: The charger accepts changeable plates so it can be adapted to charge different battery shapes without needing a separate base for each model.
• USB power input: With Micro-USB and Type-C input options and a 5V 2-3A 15W input rating, the charger works from common power banks and USB adapters on location.
• LED status display: Intelligent LED indicators show charging status and relative battery capacity so you can tell at a glance which cells are ready.
• Portable design: The charger and four spare batteries are light enough to carry in a camera bag, giving photographers a compact backup power system.

Who It's For

This kit is aimed at professional and advanced amateur photographers using Phase One backs such as IQ, IQ3, IQ4, P25, P30 and later models who need multiple replacement batteries and a flexible charger for fieldwork. It is especially useful for landscape, studio and commercial shooters who swap batteries frequently and want to charge two at once to keep pace with shooting schedules.

Photographers who need manufacturer-branded batteries for warranty reasons, highest possible OEM compatibility guarantees, or the absolute longest runtime per cell may want to consider original batteries from the camera maker instead. Casual users with infrequent shooting needs may find two spares sufficient rather than a four-pack.

Pros & Cons

Pros

• Four 2400mAh lithium-ion batteries provide dependable spare power for extended shoots.
• Dual-bay charger charges two batteries at once and accepts interchangeable plates for broad compatibility.
• USB input options including Type-C and Micro-USB make it easy to charge on the go from common power sources.

Cons

• Third-party batteries may not satisfy photographers who prefer official manufacturer cells for warranty or brand assurance.
• The charger relies on a 5V USB supply and charges at 800mA per bay, so full charge times are moderate rather than fast.

Specifications

Our Verdict

The Kastar 4-Pack Battery and LTD2 USB Charger Replacement is a practical, value-oriented kit for photographers who need multiple spares and a portable dual charger that works from USB power. It offers broad compatibility and useful LED status feedback, making it a smart backup system for field and studio work, though buyers seeking OEM branding or the fastest charge rates may look elsewhere.

Frequently Asked Questions

Are these batteries compatible with Phase One IQ series?
Yes, the kit is listed as compatible with Phase One IQ, IQ3 and IQ4 series and P-series backs that use the same battery format.

Can the charger charge two batteries at once from a power bank?
Yes, the LTD2 accepts 5V input via Micro-USB or Type-C and can charge two batteries simultaneously, drawing up to the stated input rating.

Does the kit include a charging cable?
The package includes a Micro-USB cable and the charger also supports Type-C input for added flexibility.