Kastar 4-Pack CGA-DU21 Battery and LTD2 USB Charger - Reliable Power

In this review the Kastar 4-Pack CGA-DU21 Battery and LTD2 USB Charger is evaluated for users who need dependable spare power for older Panasonic camcorders. The bottom line is simple: this kit is best for content creators or families who shoot long events and need multiple 7.2V lithium-ion batteries ready without relying on a single charger. The reviewer found the pairable dual-slot LTD2 USB charger and four 2900mAh batteries made it easy to keep cameras running for extended sessions, and the interchangeable charging plate plus both Micro-USB and Type-C inputs add useful flexibility.

Key Features

• Battery Capacity: Each 2900mAh lithium-ion cell provides extended runtime so a camera can record longer between swaps.
• Dual Charging: The charger can charge two batteries at once, reducing downtime when multiple spares are in use.
• Interchangeable Plate: Changeable charging plates let the LTD2 accommodate different battery shapes without needing separate chargers.
• Smart LED Display: The intelligent LED indicators show charging status and relative battery capacity so you know when a cell is ready.
• Multiple Inputs: Micro-USB and Type-C input options plus a supplied Micro USB cable allow use with common 5V 2-3A power sources for flexible charging on the go.
• Charger Output: The charger supplies 8.4V at 800mA per slot, matching the batteries to ensure safe, steady charging.

Who It's For

This kit suits independent videographers, event shooters, or families with older Panasonic camcorders who need several ready batteries for all-day recording. The four-pack of 7.2V 2900mAh batteries means swapping is fast and the dual charger shortens the time to replenish spares between shoots.

Those who should look elsewhere include users who require manufacturer-branded cells for warranty reasons or professionals using more modern cameras with different battery standards; this kit targets users of the listed Panasonic models and cameras with CGA-DU21 compatible batteries.

Pros & Cons

Pros

• Four high-capacity 2900mAh batteries give ample reserve power for extended recording sessions.
• Dual-slot LTD2 charger charges two cells simultaneously, cutting recharge cycles in half compared with a single-slot charger.
• Interchangeable plate and both Micro-USB and Type-C inputs make charging adaptable while traveling.
• LED charge indicators provide clear feedback on charge progress and relative battery capacity.

Cons

• Charger output is 800mA per slot, which is adequate but not the fastest possible for rapid recharging of high-capacity cells.
• Compatibility is specific to Panasonic models listed, so it is not a universal camera battery solution.

Specifications

Battery Type	Lithium-Ion
Battery Voltage	7.2V
Battery Capacity	2900mAh
Charger Input	5V 2-3A (15W), Micro-USB and Type-C
Charger Output	8.4V 800mA per slot (800mA x1, 800mA x2)
Simultaneous Charging	Can charge two batteries at the same time
Included Cable	Micro USB cable

Our Verdict

The Kastar 4-Pack CGA-DU21 Battery and LTD2 USB Charger is a practical, cost-effective way to keep older Panasonic camcorders running through long shoots. With four 2900mAh cells, a dual-slot smart charger, and flexible USB inputs, it offers strong value for hobbyists and small production users who need dependable spare power without carrying multiple single chargers.

Frequently Asked Questions

Are these batteries compatible with Panasonic CGR-DU21 models?
Yes, the pack is compatible with CGA-DU21 and equivalent listed Panasonic models such as VW-VBD060 and VW-VBD210.

Can the charger use a USB power bank?
Yes, the charger accepts 5V 2-3A input via Micro-USB or Type-C, so a suitable USB power bank can be used for charging on the go.

How many batteries can be charged at once?
The LTD2 charger can charge two batteries simultaneously; the pack includes four batteries so you can rotate and charge pairs as needed.