$30
Model name: PW7015M
Comes with two USB ports and an output power cable
43 Wh, 12000 mAh, provides my XPS 13 9350 for 1.5 to 2 hours of power
Bought in 2020 for about $80. Used for ~100 charge/discharge cycles. Great travel companion
Dell documentation: https://www.dell.com/support/home/en-us/product-support/product/dell-portable-power-companion-pw7015m/docs
Similar product: https://www.ebay.com/itm/264554536384
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