The catch
Brother ADS-1300
No AC adapter is in the US base box. With USB-A or a USB-C host that can’t supply enough power, you need optional AC power, and the outlet-free case no longer applies.
Side by side
The ADS-1300 suits eligible small packets when a compatible, permitted computer supplies at least 15 W directly over USB-C through the included cable. USB-A or lower output calls for optional AC, which is absent from the US box. The ES-400 II is the way to avoid reloading a 30-sheet packet of flat, dry, same-size loose Letter/A4 paper at 80 g/m² and 0.08 to 0.14 mm each, because its 50-sheet rating exceeds Brother's 20. Epson needs AC, permitted computer software, open trays and 10 cm of rear-wall clearance. At a powered desk with 20 eligible sheets or fewer, neither advantage decides.
Before you buy
ADS-1300 works at a temporary desk with no outlet only if the computer supports and permits its scanning software and supplies at least 15 W directly over USB-C through the included cable. Use eligible paper, with the supports open and the exit clear. On USB-A or lower output you need optional AC, which cancels that location advantage. No AC adapter comes in the US box.
Where this comes from
For ADS1300, the output threshold and the optional-power fallback come from the Brother US power article. Epson’s guide and safety instructions require the AC hardware it supplies. Treat this as an operating requirement, since it isn’t a battery-runtime or travel-comfort test. Supported paper and a clear document path are still needed for both.
The catch
No AC adapter is in the US base box. With USB-A or a USB-C host that can’t supply enough power, you need optional AC power, and the outlet-free case no longer applies.
The catch
Even a computer with a capable USB-C port doesn’t remove the need for its supplied AC adapter.


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Brother ADS-1300 and Epson ES-400 II are compared on 15 W laptop power, paper loading and software access, along with the conditions that reverse the choice.
A short packet at a temporary desk and a recurring office pile get in your way differently. With Brother, a qualifying laptop can power the scanner. With Epson, a larger eligible packet can finish feeding before you have to go back and add paper. Begin with where you’ll scan and what you’ll scan, since either advantage can vanish.
Which one fits
Brother can work in this spot if the computer permits its scanning software and supplies at least 15 W directly over USB-C through the included cable. Keep to eligible paper and feeder limits, with the supports open and the exit clear. The US box comes without an AC adapter. With USB-A or lower power, you’d need optional AC, and the outlet-free benefit is gone.
With 30 flat, dry, same-size loose Letter/A4 sheets at 80 g/m² and 0.08 to 0.14 mm each, within feeder rules, Epson spares you a trip back to the feeder caused by capacity. Its 50-sheet rating is higher than Brother’s 20. You need to allow for AC, a compatible USB computer that permits Epson software, extended trays and 10 cm of rear-wall clearance. Smaller packets lose this benefit, and none of this implies unattended completion.
Either scanner takes a single eligible load of up to 20 flat, dry, same-size loose Letter/A4 sheets at 80 g/m² and 0.08 to 0.14 mm each, as long as you follow the loading checks. Assuming permitted software, Brother’s direct 15 W USB-C or optional AC with open supports, or Epson’s AC with open trays and 10 cm rear-wall clearance, means neither main difference settles the choice.
Without an AC outlet, and with a computer that can’t supply at least 15 W through a direct USB-C connection, neither base package works for this computer-scanning setup. Brother needs optional AC power on a lower-output or USB-A route, and Epson needs its supplied AC adapter. A matching connector or a USB hub shouldn’t be assumed to make up the missing power.
If the computer you plan to use blocks both scanners or the software they require, neither one can complete the computer-file workflow. Before buying, confirm the exact operating system, USB access and permission to install and run the relevant application. Brother’s separate scan-to-USB-drive route doesn’t fix the blocked computer workflow.
You won’t get a flatbed surface from either base scanner. For the original you have, use a flatbed or overhead method that you’ve verified separately. A bigger feeder, an optional carrier or a working power source doesn’t change the requirement to keep the original still.
In practice
ADS-1300 works at a temporary desk with no outlet only if the computer supports and permits its scanning software and supplies at least 15 W directly over USB-C through the included cable. Use eligible paper, with the supports open and the exit clear. On USB-A or lower output you need optional AC, which cancels that location advantage. No AC adapter comes in the US box.
For ADS1300, the output threshold and the optional-power fallback come from the Brother US power article. Epson’s guide and safety instructions require the AC hardware it supplies. Treat this as an operating requirement, since it isn’t a battery-runtime or travel-comfort test. Supported paper and a clear document path are still needed for both.
Take 30 flat, dry, same-size loose Letter/A4 sheets at 80 g/m² and 0.08 to 0.14 mm each. Brother needs another load, and Epson’s 50-sheet rating takes the whole initial packet. At a qualifying AC-powered desk, that means Epson spares you a return trip driven by capacity. Preparing the pages and checking the files still take effort. With 20 eligible sheets or fewer, this standalone loading advantage goes away.
Published limits for the same ordinary stock are what this example compares. Take out staples and clips, fan and align the sheets, set the guides and leave the required working space. Two loads against one is a calculation about handling only. It doesn’t show that files finish faster, that jams are fewer or that unattended use is safe.
Fitting in the feeder doesn’t make thermal receipts, sticky notes or glossy pages eligible. Sort the packet first before you count on either sheet figure, because Brother also restricts mixed thickness and paper quality. Exceptions may need to be handled separately. And if an original has to stay bound and stationary, neither base feeder is suitable.
In both manuals, ordinary sheets are treated apart from exclusions and special handling. The 20- and 50-sheet figures aren’t universal capacity guarantees. Nothing here makes up a total stack-thickness number from another model’s manual, and no accessory is assumed to be included.

Brother, ADS-1300
This 20-sheet feeder is for 80 g/m² plain paper. A direct computer USB-C port that supplies at least 15 W can power it through the included cable. The computer software has to be permitted, the paper has to qualify, and the US box contains no AC adapter.

Epson, ES-400 II
Rated for 50 ordinary sheets at 80 g/m², this USB computer scanner needs the supplied AC adapter, permitted software, and room for its extended trays plus 10 cm behind it by a wall. Heavier stock lowers the rated load.
Spec by spec
| Spec | Brother ADS-1300 | Epson ES-400 II | In practice |
|---|---|---|---|
| Power away from an outlet | Direct computer USB-C port supplying at least 15 W | Supplied AC adapter plus USB computer connection | If the host you really use qualifies, Brother doesn’t need a wall-power connection for the scanner. That benefit is lost with a USB-A adapter or a lower-output port. A compact body and the shape of the connector don’t tell you whether you have a working power source. |
| Loading a recurring 30-sheet office packet | Two loads within the 20-sheet rating | One initial load within the 50-sheet rating | Epson saves one capacity-driven trip back to the feeder when the paper is flat, dry, uniform 80 g/m² Letter/A4 plain paper with each sheet 0.08 to 0.14 mm thick. Preparing, checking and saving still need your attention. A heavier stock or unsuitable materials change the example. |
| What the sheet count leaves out | Standard stock must be 51.8 to 128 g/m² and 0.08 to 0.14 mm per sheet | Letter/A4 table permits 27 to 413 g/m² with lower counts as weight rises | One ordinary paper stock is used for the comparison so that the loading counts are meaningful. Receipts, glossy photographs, attached notes and damaged pages don’t become eligible office paper because of it. The cited tables don’t offer a universal millimeter limit for these two full stacks. |
| Permission on the actual computer | Permitted USB scanning software, with iPrint&Scan among the documented options | Permitted Epson ScanSmart and scanner software | Get the supported software ready before you get to a different desk. Power from the host doesn’t give you the right to use software, and having the app installed on one computer doesn’t mean you can use it on another. Only change saved scan settings if the job calls for it. |
| Space while sheets move | Open top cover and document support arms, with a clear exit | Extend input and output trays, with at least 10 cm behind it by a wall | Measure the setup as it will operate, on a stable desk, and include room to load and collect pages. Dimensions for storage or a product photograph can’t confirm how much working space you need. |
Trade-offs
Change of plan
Go with Brother ADS-1300. Outlets stop mattering for where you scan only when Brother gets at least 15 W straight from a compatible computer over USB-C through its included cable, and you have permitted software, eligible paper, open supports and a clear exit. The US box comes without AC. If you’re on USB-A or lower output, you need optional AC, which undoes this advantage.
Go with Epson ES-400 II. For thirty flat, dry, same-size loose Letter/A4 sheets at 80 g/m² and 0.08 to 0.14 mm each, Epson’s 50-sheet feeder beats Brother’s 20. Stick to the feeder rules and provide AC, a compatible USB computer that permits Epson software, open trays and 10 cm of rear-wall clearance. Once you’re down to 20 eligible sheets or fewer, loading stops favoring Epson. Nothing here guarantees unattended completion.
Neither model fits. Without an AC outlet, and with a computer that can’t supply at least 15 W through a direct USB-C connection, neither base package works for this computer-scanning setup. Brother needs optional AC power on a lower-output or USB-A route, and Epson needs its supplied AC adapter. A matching connector or a USB hub shouldn’t be assumed to make up the missing power.
Neither model fits. Should the intended computer block both scanners or the software they require, neither can finish the computer-file workflow. Check the exact operating system, USB access and permission to install and run the relevant application before you buy. Brother’s separate scan-to-USB-drive route doesn’t rescue a blocked computer workflow. And if the original must stay bound and stationary, no base sheet feeder offers the scanning surface it needs, so use a verified flatbed or overhead arrangement.
Decision guide
Find out what power and software you have where you scan, and then count the eligible sheets in a normal packet.
By the numbers
What we found across the document scanners we compare, plus the checked facts behind each finding.
| Product | Needs it meets | Facts we checked | Sources |
|---|---|---|---|
| Brother ADS-1300 |
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| Epson ES-400 II |
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Ready to buy
Open either model on Amazon for the current price, customer reviews and delivery options.

No scanner outlet is needed for the ADS-1300 when a compatible computer permits its scanning software and supplies at least 15 W directly over USB-C through the included cable. The US box has no AC adapter, and USB-A or lower output needs optional AC, which loses this benefit. Use eligible paper within its feeder limits, with open supports and a clear exit.
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For 30 flat, dry, same-size loose Letter/A4 sheets at 80 g/m² and 0.08 to 0.14 mm each, the ES-400 II spares you a reload, provided you follow the feeder rules. Its 50-sheet rating is above Brother's 20-sheet limit. You need to provide AC, a compatible USB computer that permits Epson software, extended trays and 10 cm of rear-wall clearance. At 20 eligible sheets or fewer, this benefit disappears. Unattended completion is not guaranteed.
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