Amazon [amazon.com] has
LiTHELi U20 Replacement Lithium Battery Pack 2.0Ah 20V for
$14.22. Shipping is free w/ Prime or on $35+.
Product Description from Amazon:
- Take the U20 SUPER BATTERY with you on your outdoor adventures, camping trips, yard work, DIY projects, or just to the office. The high-quality EV-grade cell is safe for extreme temperatures down to -20℃, providing reliable power in any environment.
- The U-Battery Plus boasts a powerful output capacity of up to 45W, making it compatible with a wide range of devices, such as laptops, smartphones, tablets, drones, and more.
- Charge your devices with the two-way USB-C input/output port, saving you time and hassle.
- In addition to charging electronics, the U20 SUPER BATTERY is also compatible with Litheli U20 tools. When used to power U20 tools on gardening or DIY projects, the U-Battery Plus streamlines tasks and improves overall efficiency.
- With 20,000mAh capacity, the battery provides ample power to recharge your laptop up to 0.8 times, phone up to 1.8 times, and iPad up to 1.2 times, as well as enabling garden tools to sustain a 20-minute work duration.
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Further evidence on the actual capacity here is where in the description it states this will charge a iphone 1.8 times. iPhone 16 is 14 watthour battery and the 16 plus is 18 watt hours. So that would be, generously, about 40 watt-hours of energy stored in this pack, which means if you have a device that charges off of it at 20 watts it would run out of power after 2 hours (40 watt hours).
All that said, it's probably a good price for a highly-reviewed 30-40 watt hours of juice in a power brick.
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