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Best Portable Laptop Chargers: Here’s Where To Get Battery Packs From Anker, Belkin, Mophie and More Online Can't find a power outlet? Bring a power bank with you and juice your laptop on-the-go.

If you've got a laptop that relies on a USB-C charger, you may have gotten the idea to use it to charge your cell phone, but is it safe to do so?