Kastar SB-L320 Battery 2-Pack Replacement for Mamiya Leaf Aptus - Long

In this review the Kastar SB-L320 Battery 2-Pack is evaluated for photographers using Mamiya and Leaf medium format digital backs; the bottom line is straightforward: it is for photographers who need extended runtime and a reliable replacement pack without paying dealer prices. The reviewer found the biggest reason to buy is the high capacity 4800mAh cells that noticeably extend shooting sessions, and the built-in safety protections that reduce worry when using third-party batteries on professional camera gear.

Key Features

• High Capacity: The 4800mAh lithium-ion cells provide longer shooting time between charges, which helps when shooting on location or during long studio sessions.
• Compatibility: Designed to work with a broad range of Mamiya and Leaf Aptus models, so users of Aptus 17, 22, 65, 75 and related backs can swap in without firmware concerns.
• Built-in Protections: Over-charge, over-discharge, over-voltage, over-current and over-heating protection circuits reduce the risk of battery-related failures on critical shoots.
• Safety Standards: Cells meet UL1642 and CE safety standards, giving additional assurance for professional use and travel.
• Value Pack: The two-pack format means a ready spare battery is available, saving time between sessions and reducing the need to recharge mid-shoot.

Who It's For

This battery pair is aimed at professional and advanced amateur photographers who use Mamiya or Leaf medium format systems and need longer continuous run time and a cost-effective spare. It is particularly useful for photographers who shoot tethered in the studio, on-location portraiture sessions, or any assignment where replacing a depleted battery mid-shoot would be disruptive.

Photographers who require manufacturer-authorized batteries for warranty reasons or who demand brand-specific power management may prefer OEM batteries from the camera maker. Also, if weight or the absolute smallest physical footprint is critical, confirm fit and balance on your specific camera rig before switching.

Pros & Cons

Pros

• High capacity 4800mAh cells extend shooting time compared with many stock replacements.
• Comprehensive protection circuitry helps prevent common battery failure modes during use.
• Two-pack offers immediate spare, reducing downtime when one battery is charging.

Cons

• Third-party replacement may not be preferred by users who require manufacturer-branded batteries for warranty or service reasons.

Specifications

Battery Type	Lithium-ion
Voltage	7.4V
Capacity	4800mAh
Package	2-Pack batteries
Safety Standards	UL1642, CE
Protection	Over-charge, over-discharge, over-voltage, over-current, over-heating

Our Verdict

The Kastar SB-L320 2-Pack is a sensible, cost-effective replacement for Mamiya and Leaf Aptus users who want noticeably longer run time and built-in safety protections. For those who need reliable spares for extended sessions or travel, it offers good value, though photographers tied to OEM parts for warranty reasons should consider that trade-off.

Frequently Asked Questions

Will these batteries fit my Aptus 75 back?
Yes, the pack is listed as compatible with the Mamiya Leaf Aptus 75 and 75s models.

Are the cells safe to use in professional shoots?
The cells meet UL1642 and CE safety standards and include multiple protection circuits to reduce risk during use.

How many batteries are included?
This product ships as a 2-pack, providing an immediate spare for longer sessions.