Amazon has the Anker Solix C300 portable power station at $199.98 as of October 22, down $50.01 from its $249.99 list price. That is a 20% discount.
The C300 packs a 288Wh battery (watt-hours, the unit that says how much energy it stores) and delivers up to 300W of output. It recharges over USB-C, from a car outlet, or from solar input, though solar panels are sold separately. Anker said dual USB-C PD input, a fast-charging standard, can take the battery to 80% in around an hour. The company also said the compact body is about 30% smaller than comparable power stations.
The battery uses LiFePO4 (lithium iron phosphate) cells, which Anker describes as built for long-term use, with smart temperature control and an impact-resistant design. That chemistry is generally known for tolerating more charge cycles than the lithium-ion cells in most phones and laptops.
Capacity per dollar is the fastest way to size up a deal like this. At $199.98, the C300 costs about 69 cents per watt-hour. At the $249.99 list price, it was about 87 cents. That gives you a yardstick for any other station you are considering.
Capacity is only half the picture. On paper, 288Wh runs a 60W laptop for just under five hours, and less once conversion losses are counted. The 300W output cap matters more for some buyers: a space heater or electric kettle draws several times that, so this is a charger for phones, tablets, and laptops, not a stand-in for household backup power.
The sizing question comes before the price question. If the heaviest thing you need to run draws more than 300W, the discount is beside the point.