Portable power unit and UPS device for keeping your laptop and external monitors running during outages.
Portable power unit and UPS device for keeping your laptop and external monitors running during outages.
The Dell XPS 15 9520 uses up to 65 watts with an Anker 737 powerbank. Your test suggests it lasted about 1 hour and 5 minutes before the bank reached zero. You're wondering if a standard 130-watt powerbank would be sufficient for backup, especially with a 4K monitor drawing around 59 watts. Based on your calculations, you'd need at least 1000 watt-hours to cover both devices for several hours. Connecting just the monitor would extend its runtime beyond 15 hours, as indicated online.
Start with DC from the powerbank to DC for the laptop. When using an UPS, it switches from DC (battery) to AC via the UPS, then feeds AC into the laptop charger, which converts it back to DC. Precise calculations require knowing both UPS and laptop power adapter efficiencies—this isn’t straightforward and takes time. It’s better to invest in a watt meter or smart plug for accuracy.
Check the power supply details for your UPS model. You mentioned a 130-watt unit, which should provide sufficient backup for your XPS 15 9520 and the Samsung 32" monitor. To ensure at least five hours of operation, confirm the total wattage needed for all devices. For the Asus 24" monitor, verify its power draw as well. Adjust settings if necessary to prioritize the larger screen during an outage.
You're checking the battery capacity for your Cyberpower UPS. A typical 1070Wh unit should provide around 9 hours for a laptop and its monitors. For about 5 hours you'd need roughly 500Wh, so a 1000Wh unit would be sufficient.
You can definitely use a portable power station like a UPS. You can fully charge it and keep it connected to your wall outlet. Then connect your laptop and monitors to it. It functions similarly to a UPS or surge protector, providing backup power during outages. If the power goes down, you'll have electricity until the station runs out.
Regarding longevity, many users report these units lasting up to ten years with a five-year warranty. However, leaving it fully charged for extended periods isn't recommended—it can cause battery degradation over time. It's best to charge it to full capacity and then use it only when needed. This approach helps maintain its performance and lifespan.