A portable charger is a small device that can store electricity and charge other devices like phones or tablets when they run out of battery power. Full definition
Unfortunately, you do want to tuck away its power adapter, which is disproportionately large for a router this size; it's about the size of portable charger for a small laptop. (cnet.com)
I also brought a couple of portable chargers in case I needed a boost of power and there was no sun (as did happen a couple of times). (theprofessionalhobo.com)
We feel your pain, and that's why we've been checking out some of the best portable chargers on the market. (digitaltrends.com)