Suaoki (99% positive in the last 12 months of 6,342 ratings) via Amazon is offering its K12 8000mAh 300A Peak Jump Starter Power Bank Lithium Battery Booster for $21.71 shipped using code SRFU7W8A at checkout. That’s more than $10 under the regular price and the best we can find. Rated 4+ stars from over 140 Amazon customers.

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Suaoki K12 Peak Jump Starter Power Bank Features:

  • 3-in-1 Solution: the fully charged 8000mAh capacity (300A peak) battery can boost your 12V vehicle (up to 2.5L gas engine), motorcycles, snowmobiles and motorboats, while the built-in flashlight and a USB port to keep your electronic gadget charged
  • High Performance: thanks to the TIR-C technology support, the jump starter as a powerbank is capable of keeping a safer constant current and saving charging time within max 2.1 amps speed while charging different electronic devices
  • Built-in LED Flashlight: 3 modes of illumination in the dark: Strong/SOS/Strobe, 4 blue LED lights for charging indication
  • Safety Guaranteed: No over-heating, over-current, overcharging and short circuit problems on account of its intelligent circuit protection; a 12-month warranty is provided to ensure a long-term use
  • Portable & Convenient: Palm-sized and lightweight, extremely easy to carry or stash in the glove compartment of your vehicle