this one is solid. 10k mah, solar charges, or plugs in to fast charge, has usb connection and Qi wireless charging. Plus built in flashlight.

Get one with more than 2,000 mah or you'll find yourself charging the charger more than you charge your phones.

Yes, it can charge multiple phones at once.

amazon link I bought my dad this one and he tinkered with it, drained it to 0 and then left it out and it didn’t have a single charge in it in full sun in FL after all day. While the solar was a gimmick, (bc they work but they don’t work hard enough), and a lot of these are the same, the battery itself was thick enough to last a lot of people for a lot of days, so you probably wouldn’t notice really that the solar part was not really working. If you’re out for a whole week I would just get a good battery and conserve your usage bc I think you’re going to spend a LOT of money trying to get a good working solar panel and the packing is going to be annoying and not realistic.

I have battery https://www.amazon.com/dp/B07FDXDB3W/ref=cm_sw_r_apan_glt_i_S309YFFSERS5K0KWPWBV) it's a decent 10k battery bank with the solar capabilities. Like others said, the size of these things doesn't capture enough energy to really be handy. I guess In a life or death situation it'll help, but it's not going to be quick. Overall I've had this for about 2+ years with no issues.