FSATBTNE FS400W 400W Car Power Inverter

The FSATBTNE FS400W is a vehicle-powered inverter listing 400 watts of output, two AC outlets, a 65W USB-C port and an 18W USB-A port. Its 12V car-socket input and compact housing suit charging several devices on road trips, but customer feedback is mixed on charging, reliability and whether the claimed output is achieved.

At a glance

Two AC outlets plus USB-C and USB-A charging ports provide different connection types in one vehicle adapter.
The listing specifies up to 65W USB-C PD and 18W USB-A QC charging.
A built-in fan is described as adjusting its speed according to temperature and load.

Price

$22.94Save 24%

Reference price: ~~$29.99~~

Price checked: Nov 14, 2026

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Pros and cons

Pros

Combines two AC outlets with USB-C and USB-A ports in a compact vehicle inverter.
The stated 65W USB-C output can suit compatible laptops and other devices that accept USB-C PD charging.
A 24-inch cigarette-lighter plug is claimed in the product description.

Cons

The modified-sine-wave output may not suit every device, so check the powered equipment's requirements before use.
The listing says not to use it with devices above 400W.

Technical specifications

14 specifications

Identity
Brand	FSATBTNE
Model	FS400W

Power and input
Power configuration	Vehicle DC Power Socket
Input voltage	12 volts
Continuous output	400 watts
Peak output	800

Outlets and charging
AC outlets	2
Output waveform	Modified Sine Wave
USB-C output	65W PD USB-C
USB-A output	18W QC USB-A

Design and stated details
Dimensions	6.6"L x 4.3"W x 2.3"H
Housing	aluminum alloy
Energy specifications met	CE
Warranty description	24 MONTH

What to know before buying

Listing details to confirm

The listing gives 6.6"L x 4.3"W x 2.3"H in the technical details but 4.6*3.1*1.8 inches in its feature text. It also claims 400 watts continuous output and 800 watts peak, while customer feedback is mixed about whether it reaches 400 watts. Confirm the dimensions and the load's power needs before purchase. The stated input is for a 12V vehicle socket, not 16–24V supplies.

Who is it for?

A good fit for

Drivers wanting AC outlets and USB charging from a compatible 12V vehicle socket.
Road-trip users charging phones, tablets or compatible USB-C laptops, subject to the devices' power requirements.

Less suited to

Users needing a pure sine wave inverter.
Anyone powering equipment that requires more than 400W or a non-12V input.

FSATBTNE FS400W 400W Car Power Inverter · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.3 / 5 · 878 ratings

5 stars73%73%
4 stars9%9%
3 stars6%6%
2 stars2%2%
1 star10%10%

Customer feedback is favorable about compact size and reported quality, but opinions are mixed on charging performance, reliability, heat, value and whether the inverter delivers the claimed 400W. Those uncertainties matter if you plan to run higher-load equipment or depend on it for charging. The listing's port and power figures describe intended capability, not confirmation that every customer's device will charge or that every load will work.

Positive themes

Customers report good quality and appreciate the compact size.

Mixed feedback

Charging performance is reported as inconsistent, including reports of fast charging and of devices not charging.
Reliability feedback varies from continued use to reports of failure on first use.
Customers disagree about whether the inverter delivers 400 watts and whether it represents good value.

Frequently asked questions

What input does the FSATBTNE FS400W use?

The listing specifies a vehicle DC power socket and 12 volts. It says the inverter is not for 16–24V power supplies.

How many outlets and charging ports are listed?

It has two AC outlets, one USB-C port listed at up to 65W PD, and one USB-A port listed at up to 18W QC.

Is the output pure sine wave?

No. The listed waveform is Modified Sine Wave. Check whether your equipment is compatible with that output type.

Does the listing establish that it continuously delivers 400 watts?

The listing claims 400 watts continuous and 800 watts peak, but customer feedback includes disagreement about the 400-watt output. Treat those figures as listing claims and check device requirements.