NB10000 GEN3 Portable Charger

The NB10000 earned its following on one number: 150 grams for 10,000 mAh, roughly half what a conventional bank of that capacity weighs. The carbon-fiber shell, and both ports handling input and output, make it the default for anyone counting grams on a week-long trip. What you give up is real. The rating is cell capacity, not what reaches your phone: after conversion losses, plan on roughly two full phone charges rather than three. Output tops out around 18W and is shared across the ports, so it refills a big-battery phone slowly, will not run a laptop, and slows further with two devices plugged in. Refilling the bank itself takes hours, which matters on a short town stop. And at its list price you are paying about triple what a heavier 10,000 mAh brick costs. On weekend trips where 150 grams is noise, that money is better spent elsewhere.