Kastar LCD Dual Smart Fast Charger & Battery (2 Pack) - Reliable Power

In this review of the Kastar LCD Dual Smart Fast Charger & Battery (2 Pack), the bottom line is simple: photographers who need dependable, high-capacity replacements for Nikon EN-EL4 series batteries will find strong value here. The reviewer found the twin batteries offer noticeably longer run time thanks to high quality Japanese cells, and the accompanying dual LCD charger gives clear status and safe CC/CV charging for two batteries at once. This kit is best for users who shoot extended sessions with older Nikon D2/D3 and D300/D700 bodies and want a smart, affordable way to keep spares ready.

Key Features

• Ultra-high Capacity Batteries: Kastar uses high quality Japanese cells so the batteries deliver extended runtime and resist memory effect for consistent performance during long shoots.
• Dual Fast Charger with LCD: The charger supports charging two batteries simultaneously and shows the charging status and battery capacity on an easy to read LCD screen.
• Wide Voltage Compatibility: The charger can handle batteries from 6.8V to 16.8V and the MCU automatically identifies voltage to apply the correct charge profile.
• Safe CC/CV Charging: The CC/CV charge method with pre-charge and 0V activation helps revive deeply discharged Li-ion cells and reduces risk of overcharge.
• Model Compatibility: Works with Nikon EN-EL4/EN-EL4A and fits a long list of cameras and grips including D2 series, D3 series, D300/D300S, D700 and MB-D10/MB-40 users.

Who It's For

This kit is aimed at photographers using older Nikon bodies that accept EN-EL4 family batteries, especially wedding, event, or location shooters who need at least two spare batteries and a reliable charger. The high capacity cells make this appealing to anyone who shoots long bursts, video, or multi-hour sessions and wants to avoid frequent battery swaps.

Those who should look elsewhere include users of modern Nikon cameras that do not accept EN-EL4 style batteries and buyers who require manufacturer-original branding for professional rental houses. Also note some camera configurations require an extra BL-3 battery chamber cover to fit in certain grips.

Pros & Cons

Pros

• High capacity batteries provide longer shooting time compared with typical stock cells.
• Dual charger with LCD makes it easy to monitor two batteries at once and manage charging safely.
• Smart MCU and CC/CV charging add safety features like pre-charge and 0V activation to protect cells.
• Wide compatibility across many EN-EL4 cameras and grips makes this a flexible kit for legacy Nikon systems.

Cons

• Charging speed drew mixed feedback from customers, so users expecting uniformly fast recharge times may be disappointed in some cases.
• Some camera grips or models may need an extra BL-3 battery chamber cover to accept the replacement battery.

Specifications

Brand	Kastar
Battery Type	EN-EL4 / EN-EL4A compatible, high quality Japanese cells
Pack	2 batteries + dual LCD charger
Charger Voltage Range	6.8V - 16.8V automatic identification
Charging Method	CC/CV with pre-charge and 0V activation
Compatibility	Nikon D2 series, D3 series, D300/D300S, D700, MB-D10, MB-40, F6, and more

Our Verdict

The Kastar LCD Dual Smart Fast Charger & Battery 2 pack is a practical, cost-effective choice for photographers who rely on legacy Nikon bodies and need dependable, higher-capacity spares. It pairs safe, intelligent charging with clear LCD monitoring and generally good battery life, making it a sensible value buy for freelance shooters and hobbyists who want fewer interruptions during shoots.

Frequently Asked Questions

Do these batteries work with Nikon D3X and D2X?
Yes, the batteries are compatible with Nikon D2 series and D3 series cameras including D2X and D3X as listed.

Can the charger handle two batteries at once?
Yes, the Kastar dual charger can charge two batteries simultaneously and the LCD shows each battery's charging status.

Is an extra part required for some camera grips?
Some grips may need the BL-3 battery chamber cover to accept the replacement battery; check grip compatibility before purchase.