Our First Draft
This is our first draft. Our chief engineer, Rain, hand made this picture. This looks like the only way we can make a battery powered jump starter in Spring, 2018, because the technology only allow batteries to stay in the power bank shape box.
That is also the reason why 99% of the battery sold on Amazon.com is power bank shape. We bought several battery jump starters from Amazon.com. They are not what we are looking for.
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