Kastar 3-Pack NP-QM71D Battery and LTD2 USB Charger - High Capacity

In this review of the Kastar 3-Pack NP-QM71D Battery and LTD2 USB Charger, the bottom line is simple: this kit is for photographers and videographers who need reliable, long runtime power and a flexible dual charging option. The set pairs three 7.4V 3600mAh lithium-ion replacement batteries with a compact USB dual charger that can accept Micro-USB or Type-C input, making it a practical choice for travel and field shoots. The biggest reason to buy is the combination of high capacity batteries and an intelligent charger that shows charge status while handling two batteries at once.

Key Features

• High capacity battery: Each 7.4V 3600mAh lithium-ion battery provides extended runtime for longer recording sessions or more shots between swaps.
• Dual simultaneous charging: The LTD2 charger can charge two batteries at the same time, saving time when preparing for a shoot.
• Interchangeable plates: The charger plate can be changed to fit different Sony battery models, adding versatility for users with multiple battery types.
• USB powered convenience: With Micro-USB and Type-C inputs and a 5V 2-3A input range, the charger can use common power banks or wall adapters on the go.
• Intelligent LED display: The charger uses LED indicators to display charging status and approximate battery capacity, making it easy to monitor progress.
• Compact and portable: The charger and batteries are easy to carry in a camera bag, offering a practical travel-friendly power solution.

Who It's For

This kit is well suited to enthusiast photographers, independent videographers, and owners of older Sony camcorders or cameras that use NP-FM/NF-QM series batteries who want a high-capacity spare power supply. The batteries are especially useful when long recording times are needed without frequent battery swaps.

Those who should look elsewhere include users who must have manufacturer-branded OEM batteries for warranty reasons or very specific professional environments that require factory-certified power sources. Also, if a single ultra-fast proprietary charger is essential, this USB-based charger may not match that exact workflow.

Pros & Cons

Pros

• Large 3600mAh capacity provides noticeably longer run times than many lower-capacity replacements.
• Charger can handle two batteries at once, cutting overall recharge time for multiple batteries.
• USB input options and included Micro USB cable make charging flexible and travel-friendly.
• Interchangeable plate and LED status indicators simplify compatibility and monitoring.

Cons

• Charger output is 800mA per slot, so recharge times will be longer than high-current proprietary chargers.
• Included cable is Micro USB only; Type-C cable may need to be sourced separately for that input.

Specifications

Battery Type	Lithium-Ion
Battery Voltage	7.4V
Battery Capacity	3600mAh
Charger Input	5V 2-3A (USB)
Charger Output	8.4V/4.2V 800mA (x1) 800mA (x2)
Compatibility	Sony NP-FM30/50/55H/70/71/90/91 and NP-QM50/51/71/91 series

Our Verdict

The Kastar 3-Pack NP-QM71D Battery and LTD2 USB Charger is a strong value for users who need dependable, extended battery life and flexible USB charging. It is especially practical for travel and field work where USB power is available and two batteries may be charged at once. Given the high 3600mAh capacity and intelligent charger, this kit is recommended for hobbyists and independent creators seeking affordable extra runtime.

Frequently Asked Questions

Are these batteries compatible with my older Sony camcorder?
They are compatible with many Sony NP-FM and NP-QM series batteries listed, so check your model against the included compatibility list to confirm.

Can I charge both batteries simultaneously from a power bank?
Yes, the LTD2 charger accepts USB power and can charge two batteries at the same time, provided the power source can supply 5V at 2-3A.

Does the kit include a Type-C cable?
The kit includes a Micro USB cable, and the charger supports Type-C input but a Type-C cable may need to be supplied separately.