Kastar V4 Battery and LCD Dual USB Charger - Long Life Replacement

Our review looks at the Kastar V4 replacement battery kit for Ring V4-compatible devices and the accompanying LCD dual USB charger. This package is aimed at owners of older Ring Doorbell and Spotlight Cam models who need a reliable spare or replacement power pack. The single biggest reason to buy is the combination of a high-capacity 6040mAh lithium-ion battery and an intelligent LCD charger that can charge two batteries at once, making it practical for anyone who wants longer runtime and convenient charging without juggling multiple chargers.

Key Features

• High capacity battery: The 6040mAh lithium-ion cell offers extended runtime compared with many stock replacements, which helps reduce how often the battery needs swapping.
• Dual USB charger: The included LCD USB charger charges two batteries simultaneously so users can keep a spare ready while another is in use.
• Intelligent LCD display: The charger shows charging status and battery capacity so it is easy to see when batteries are ready without guessing.
• Simple connectivity: The charger uses a Micro USB input and ships with a Micro USB cable, giving multiple charging options with common 5V 2A power sources.
• Portable design: The charger is compact and easy to carry for installations or travel where quick battery swaps are needed.

Who It's For

The Kastar V4 kit is best for owners of Ring Doorbell 2, Ring Video Doorbell 2 and 3, Ring Door View Cam, Ring Spotlight Cam V4, and devices that use the Ring V4 or Ring 8AB1S7 battery models who want a higher capacity spare and a charger that can manage two batteries. It suits homeowners who perform their own maintenance and prefer having a ready second battery to avoid downtime.

People who should look elsewhere include users of newer doorbell models that require different battery formats or those who need factory-branded accessories for warranty reasons. Also, if USB-C is a strict requirement, this kit uses Micro USB and may not match preferences for newer cable standards.

Pros & Cons

Pros

• High 6040mAh capacity provides longer runtime than many standard replacements.
• Dual charging with an LCD readout simplifies maintaining a spare battery.
• Includes a Micro USB cable and works with common 5V 2A inputs for flexible charging.

Cons

• Charger uses Micro USB rather than USB-C, which may be less future-proof.

Specifications

Our Verdict

The Kastar V4 battery and LCD dual USB charger is a practical value choice for owners of compatible Ring V4 batteries and older Ring doorbell and camera models who need longer runtime and simple dual charging. Its high 6040mAh capacity and clear LCD readout make battery management straightforward, though the Micro USB input is a minor drawback for those wanting USB-C. Overall it offers good value for keeping surveillance devices online with minimal fuss.

Frequently Asked Questions

Is this battery compatible with my Ring Doorbell 2?
Yes, the kit is compatible with Ring Doorbell 2 and other models that use the Ring V4 or Ring 8AB1S7 battery formats.

Can the charger charge two batteries at the same time?
Yes, the LCD dual USB charger is designed to charge two batteries simultaneously and shows charging status on the display.

What cable type is included?
The package includes a Micro USB cable and the charger accepts a 5V 2A input for flexible power source options.