Kastar 4-Pack NP-QM71D Battery and LTD2 USB Charger - Long Runtime

In this review the Kastar 4-Pack NP-QM71D Battery and LTD2 USB Charger is examined for photographers and videographers who still use legacy Sony NP-F series batteries and need reliable spares. The bottom line: this bundle is aimed at users who want a high-capacity replacement set and flexible charging options, delivering a clear benefit in extended runtime and simultaneous charging. The reviewer found the 3600mAh 7.4V lithium-ion cells paired with a dual-slot USB charger to be a practical, portable solution for longer shoots and travel where wall power may not be convenient.

Key Features

• High capacity battery: Each 3600mAh 7.4V lithium-ion battery provides extended recording time compared with factory low-capacity cells, reducing interruptions on shoots.
• Dual simultaneous charging: The LTD2 charger can charge two batteries at once, which cuts downtime when multiple spares are needed for back-to-back sessions.
• Convertible plate design: The charger plate can be changed to accept different NP-F style batteries, adding versatility for mixed battery inventories.
• USB power inputs: With both Micro-USB and Type-C input support and a Micro USB cable included, the charger can be powered from power banks, laptops, or wall adapters for mobile charging.
• Intelligent LED indicators: The charger uses LED lights to display charging status and approximate battery capacity so users can monitor progress at a glance.
• Compact and travel friendly: The charger input of 5V 2-3A and 15W rating keeps the unit small and easy to carry without bulky power bricks.

Who It's For

This kit is well suited for content creators, camcorder owners, and hobbyists who use Sony NP-FM/NP-QM series batteries and need a cost-effective way to increase on-camera runtime. The high 3600mAh capacity makes it a good match for long recording sessions, event coverage, or travel where changing batteries frequently is undesirable.

It is not targeted at users who require OEM-branded batteries for warranty reasons or those who need specialized fast charging above the chargers 800mA per slot; professional rigs that rely on camera-specific proprietary charging docks may prefer original manufacturer accessories.

Pros & Cons

Pros

• Large 3600mAh cells deliver noticeably longer runtime for cameras and camcorders using NP-F style batteries.
• Charger accepts two batteries at once and can switch plates to accommodate different NP-F models, improving convenience.
• USB input options and included Micro USB cable make it easy to charge from common power sources while traveling.
• LED indicators provide a quick visual of charging status and battery capacity.

Cons

• Charging current is modest at 800mA per slot, so full recharge times are longer than higher-current chargers.
• Package does not include a Type-C cable despite supporting Type-C input, so users relying on that will need to supply one.

Specifications

Battery Type	Lithium-Ion
Battery Voltage	7.4V
Battery Capacity	3600mAh
Charger Input	5V 2-3A (15W)
Charger Output	8.4V/4.2V 800mA (x1) 800mA (x2)
Charging Ports	Micro-USB and Type-C input (Micro USB cable included)

Our Verdict

The Kastar 4-Pack NP-QM71D Battery and LTD2 USB Charger is a practical, value-oriented bundle for shooters who need multiple high-capacity NP-F batteries and flexible USB charging. Its large 3600mAh cells and dual-slot charging make it a sensible choice for longer sessions and travel, though users wanting the fastest possible recharge will notice the modest 800mA per slot rate.

Frequently Asked Questions

Are these batteries compatible with my Sony NP-F cameras?
Yes, the pack lists compatibility with many Sony NP-FM and NP-QM series models such as NP-FM70, NP-FM71, NP-QM71 and others; use model search to confirm your exact camera model.

Can I charge two batteries at the same time?
Yes, the LTD2 charger supports simultaneous charging of two batteries with an output of 800mA on each slot.

Does the kit include all cables for Type-C charging?
The kit includes a Micro USB cable; Type-C input is supported but a Type-C cable is not included, so users may need to supply one.