CGA-DU21 Replacement 4-Pack Batteries with AC Charger - Long Life

In this review the reviewer tested the Kastar 4-Pack CGA-DU21 replacement batteries and included AC wall charger to see if it is a practical power solution for older Panasonic camcorders. The bottom line: this kit is for owners of compatible Panasonic PV-GS series cameras who need multiple spare batteries and a simple wall charger; the single biggest reason to buy is the large 2900mAh Lithium-Ion capacity per cell which extends run time significantly compared with typical OEM packs. The review focuses on fit, charge behavior, and everyday usability.

Key Features

• Battery Type: 7.2V Lithium-Ion chemistry provides stable power and avoids the memory effect of older chemistries, so users get reliable run times.
• High Capacity: Each 2900mAh battery gives noticeably longer recording and standby time than smaller third-party packs, reducing interruptions during shoots.
• Included Charger: The AC wall charger features a foldable flat pin for compact storage and easy travel in tight camera bags.
• Wide Input Range: Charger input of 100~240V 50~60Hz means it will work in many regions with the correct plug or adapter for international use.
• Charge Indicator: LED status shows red while charging and green for standby or full-charge so you can tell when batteries are ready at a glance.
• Complete Kit: Package contains four replacement batteries plus the AC charger, making it convenient for long shoots without needing multiple chargers.

Who It's For

This kit is best for photographers and videographers who own compatible Panasonic camcorders in the PV-GS series and want multiple spare batteries to avoid downtime on shoots. It is especially useful for hobbyists, event videographers, and anyone who prefers swapping batteries rather than relying on a single pack.

It is less suitable for users who need a car adapter or a European plug included, since those are not provided, or for those who require a charger with multiple simultaneous bays or USB output. Pros needing OEM-brand confirmation for professional rentals should verify compatibility with their camera before purchase.

Pros & Cons

Pros

• High 2900mAh capacity extends camera run time and reduces the frequency of swaps.
• Charger with foldable pin is compact and easy to pack with camera gear.
• LED indicator simplifies charging by clearly showing charge status.
• Four batteries in the package offer good value for prolonged use away from mains power.

Cons

• Car adapter and European plug are not included, so international or in-vehicle charging needs extra accessories.
• As a third-party battery pack, users who require official OEM labeling for rental houses may need to confirm acceptance.

Specifications

Battery Type	Lithium-Ion
Battery Voltage	7.2V
Battery Capacity	2900mAh
Charger Input	AC 100~240V 50~60Hz
Charger Output	DC 8.4V 600mA
Charge Indicator	LED red charging, green standby/full
Package Contents	4 batteries + 1 AC charger

Our Verdict

The Kastar 4-Pack CGA-DU21 kit is a practical, cost-effective solution for owners of compatible Panasonic PV-GS camcorders who need multiple spare batteries and a compact wall charger. With 2900mAh cells and a clear LED charge indicator, it delivers extended run time and straightforward charging; buyers should note the absence of car or European plugs but overall this kit offers solid value for extended shoots and casual pro use.

Frequently Asked Questions

Are these batteries compatible with PV-GS series cameras?
Yes, the pack is listed as compatible with many Panasonic PV-GS models; use the camera model search to confirm exact fit.

Does the charger support international voltage?
Yes, the charger accepts 100~240V 50~60Hz, but a local plug adapter is required where outlets differ.

Is a car adapter included?
No, the package includes four batteries and an AC wall charger only; car adapters and other plugs are not included.