Everyone wants their smartphone or tablet to have a longer battery life, but sometimes they need some help. Today, Amazon is holding a one-day deal on three external battery chargers from RAVPower that will offer owners more time to use their devices, especially if they are on the road.

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If you want something in a smaller form-factor, check out the RAVPower 12,000mAh. Even though it’s smaller compared to the other two chargers on sale, it can still keep a Samsung Galaxy S7 up and running by up to three times on a single charge. It also has two inputs for charging two devices at the same time. For today only, you can get this charger from Amazon for just $19.49, well below its normal $49.99 price tag.

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If you want something more, the RAVPower 16750mAh external battery pack may be to your liking. It also has two USB charging ports that can power up two tablets at the same time. It even has its own flashlight in case you need to get around in the dark. It’s priced for today only at $23.99 at Amazon, a big price cut compared to its normal cost of $64.99. It also comes with your choice of black or white colors.

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Finally, folks who absolutely need to power up their devices on the road should check the RAVPower 26800mAh battery pack. It has three USB ports for charging up to three devices at one time, and can charge the Galaxy S7 several times on one charge. It’s available today for $37.49 at Amazon, well below its normal $79.99 price tag.

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Once again, these special deals will expire at the end of the day today. Which one of these RAVPower external battery packs will you be getting?