Kastar LCD Dual Smart Fast Charger & Battery Pack - Dual Fast Charge

In this review the Kastar LCD Dual Smart Fast Charger & Battery (1 Pack) is assessed for run-and-gun camcorder users who need reliable spare power and quick recharge turnaround. The bottom line: this pack is best for videographers using compatible JVC camcorders who want a high-capacity replacement battery plus a smart dual charger that can handle two batteries at once and display charge status on an LCD. The reviewer found it straightforward to use, broadly compatible across JVC SSL and GY series batteries, and noticeably better at preserving cell health than older packs.

Key Features

• Ultra-high capacity battery: Uses high quality Japanese cells designed to deliver longer runtime and reduced memory effect for consistent performance during long shoots.
• Dual fast charging: The charger can replenish two batteries simultaneously, cutting downtime between shoots when multiple packs are in rotation.
• Wide voltage compatibility: Supports batteries from 6.8V to 16.8V so it works with a wide range of camcorder battery sizes and voltages without manual settings.
• Intelligent MCU control: The control MCU automatically identifies battery voltage and applies an intelligent charge profile to prevent overcharge and improve safety.
• Clear LCD status: The built-in LCD shows charge status and battery capacity so users can confirm state of charge at a glance before mounting on camera.
• CC/CV charging with pre-charge: Constant current / constant voltage charging plus pre-charge and 0V activation help revive deeply discharged li-ion cells and extend battery life.

Who It's For

This pack is aimed at independent videographers, ENG shooters and small production crews using JVC GY-HMQ10, GY-LS300, GY-HM200, GY-HM600 series cameras and compatible SSL-JVC battery models who need a dependable spare battery and a capable charger. It is especially useful when you carry multiple packs and need to top two at once while monitoring charge with the LCD.

Those with cameras outside the listed JVC compatibility or who require manufacturer-branded batteries for warranty reasons should look elsewhere; also, users who only need a single lightweight charger may find the dual fast charger larger and more equipment than required.

Pros & Cons

Pros

• High quality Japanese cells give longer runtime and less memory effect than generic packs.
• Can charge two batteries at once and adapts automatically to battery voltage for convenience.
• LCD provides visible charge status and capacity information so you can plan battery swaps.
• CC/CV charging with pre-charge and 0V activation helps maintain battery health over time.

Cons

• The charger and single high-capacity battery make a bulkier carry solution compared with compact single-slot chargers.
• Compatibility is focused on JVC SSL and GY series batteries, so it is not a universal camcorder solution.

Specifications

Product type	Kastar battery and dual fast charger pack
Battery cells	High quality Japanese cells
Voltage range supported	6.8V - 16.8V
Charger display	LCD shows charging status and battery capacity
Charging method	CC/CV with pre-charge and 0V li-ion activation
Compatibility	JVC SSL-JVC50/70/75, BN-S8I50, GY-HMQ10, GY-LS300, GY-HM200/250/600/650 series

Our Verdict

The Kastar LCD Dual Smart Fast Charger & Battery pack is a practical, value-focused choice for JVC camcorder users who need extra runtime and the convenience of charging two batteries at once. Its intelligent charging, LCD feedback and high-quality cells make it a sensible replacement or backup without the premium price of OEM packs, though it is larger than single-slot chargers and best suited to users who rotate multiple batteries.

Frequently Asked Questions

Will this work with my GY-LS300 camera?
Yes, the pack lists compatibility with the GY-LS300 and related models, so the battery and charger should be compatible with that camera's battery requirements.

Can it charge two different voltage batteries at the same time?
The control MCU automatically identifies battery voltage and applies the correct charge profile, allowing the charger to handle supported batteries in its voltage range simultaneously.

Does the charger help revive deeply discharged batteries?
Yes, the CC/CV charging method includes pre-charge and 0V activation functions designed to safely recover deeply discharged li-ion batteries.