The 12-outlet Tripp Lite AVR900U is the wrong intersection of perfectly fine separate features in an otherwise well-made model. Its reasonable battery size could support a tricked-out computer system with multiple displays and peripherals for a few to several minutes during a power outage. The line-interactive approach incorporated in its design provides fast power switchover (as quick as a few milliseconds), along with constant power conditioning to correct for minor fluctuations without wearing out the internal battery.
On the other hand, the AVR900U relies on simulated power switching instead of a “pure” sine wave. That means it’s not the right choice for computers with active power factor correction (PFC). A simulated, or stepped, sine wave fed into an active PFC power supply can cause a high-pitched whine and prematurely wear its components or even cause it to fail.
Active PFC power supplies are more efficient than previous designs, and also allow voltage adaptive for worldwide sales. But they’re finicky about the smoothness of the alternating current fed into them, and it’s not worth the price of repairing your computer rather than buying a better-suited UPS with a pure sine-wave output that’s as smooth as utility power.
For about $40 more, you can instead purchase the CyberPower CP850PFCLCD (fave.co/3ClGhCq), a line-interactive UPS that also has a pure sine-wave output and similar power capacity. (We reviewed the slightly higher-capacity CyberPower CP1000PFCLCD [fave.co/2WEYXfR], which is in same series of UPS models.)
Diese Geschichte stammt aus der September 2021-Ausgabe von Macworld.
Starten Sie Ihre 7-tägige kostenlose Testversion von Magzter GOLD, um auf Tausende kuratierte Premium-Storys sowie über 8.000 Zeitschriften und Zeitungen zuzugreifen.
Bereits Abonnent ? Anmelden
Diese Geschichte stammt aus der September 2021-Ausgabe von Macworld.
Starten Sie Ihre 7-tägige kostenlose Testversion von Magzter GOLD, um auf Tausende kuratierte Premium-Storys sowie über 8.000 Zeitschriften und Zeitungen zuzugreifen.
Bereits Abonnent? Anmelden
Mac 911
Solutions to your most vexing Mac problems.
Bowers & Wilkins Pi8: Great-sounding headphones that support aptX
B&W's new top-of-the-range Bluetooth earbuds sound great and include an innovative smart case that supports aptX technology for high-quality audio-even on Apple devices.
AirPods versus AirPods Pro: How they compare
Don't know whether to buy the AirPods 4, AirPods 4 with ANC, or AirPods Pro 2? Here's how they stack up.
Apple's true hit of 2024 isn't the iPhone 16
Apple's unsung hero of the fall is the AirPods 4.
Ugreen Revodok Pro 210: Decent speeds at a nice price
A hub for users who don't need top performance from their connections.
Anker Prime 100W GaN Wall Charger: Clever and compact
Anker proves that with a clever design, you can also achieve compact dimensions suitable for traveling.
Wombat Willow: A solid typing tool with some quirks
This isn't a keyboard that lets you simply plug in and go-you need to read the manual.
pdfFiller: An overpriced, half-baked PDF editor for macOS
A basic PDF editor that doesn't fulfill its promises and costs too much.
iPHONE 16 & 16 PLUS REVIEW: THE PHONE FOR EVERYONE CREEPS INTO PRO TERRITORY
APPLE'S BEST ALL-AROUND PHONE IS BETTER AND ALL-AROUNDER.
APPLE WATCH SERIES 10 REVIEW: MODEST IMPROVEMENTS TO A PROVEN FORMULA
IF YOU'VE BEEN WAITING FOR A BIG APPLE WATCH REVAMP, THIS ISN'T IT, BUT IT'S STILL THE BEST SMARTWATCH AROUND.