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Input power limit: 5v 3A (15W)
TikTok LX-2BUPS mini review: https://www.tiktok.com/@sylatoka/video/7423125511762693382
Tiktok how to change output voltage of LX-2BUPS: https://www.tiktok.com/@sylatoka/video/7453133571046296837
Related articles: https://hackmd.io/@mrhw/rJYwIQeGC
https://cdn.hackaday.io/files/1829407826904960/Xysemi_XR2981.pdf
Price: 4$
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Charge the UPS
2x3500 mAh charge time is ~ 7 hours (from discharge to 2.5v)
Normal charge 6h50m
Other device charge attempt. LX-28USB with a mix of new LiitoKala 3500mAh and old unknown 2600 mAh (about 2100mAh real capacity) batteries
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