There’s nothing worse than the sinking sensation of watching your computer screen suddenly turn black and realize that it’s been hours since you last resigned. And as we head to the summer months when forest fires, hurricanes and other natural disasters are more frequent, you can expect power outages to become more frequent. If you want to avoid this headache completely, it is worth investing in a reliable spare battery. Today, Woot has a huge selection of factory-updated CyberPower backup systems on sale, where you can save hundreds compared to the cost of new ones. This sale ends tonight at 9:59 PM PT (00:59 ET)so be sure to receive your order beforehand.

The backup battery, sometimes called an uninterruptible power supply or UPS, essentially functions as a power strip with a large power bank that can be used to power your computer, your console, or your Wi-Fi network in the event of a shutdown. It also serves as a surge protector to protect your electronics from blown fuses or other everyday risks.

There are over 20 different models in this sale, and some are designed to work better with specific types of electronics than others. If you are looking for general protection for your desktop computer, Wi-Fi router or other home office electronics, CyberPower SX950U is a great option for only $ 65. It has a capacity of up to 950 volts-amperes or 510 watts of power, takes about eight hours to fully recharge and is equipped with 12 outputs and two USB-A charging ports to power many different devices at once. It is also designed to run as quietly and efficiently as possible so that you can continue to operate without distraction.

If you’re mostly looking for a battery for your gaming setup, $ 135 CyberPower GX1325U-FC is designed specifically for consoles and gaming computers. It has a large storage capacity of up to 1325 volts amps or 810 watts and is designed to protect your Xbox, PlayStation or high-end computer from electrical interference, whether it uses conventional power or one with active power factor correction.

And if you have a few devices that need to stay on, even during an eclipse, you can catch that CyberPower OR1500LCDRM1U-R for $ 300. Designed for office use, this UPS is designed to provide uninterrupted power to departmental servers, workstations, network devices and more. It has a large power capacity of up to 1500 volts-amperes or 900 watts, and also has automatic voltage regulation to maintain safe voltage levels without having to switch to battery power.

Read more: 14 things you need to do now that will save you during a power outage

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