Thanks. The internal photo shows AXP2101 IC and in accordance datasheet it has 100mA-1A internal linear battery charger. So it's normal for this IC. Bad choice though. Probably it was cheaper that something like AXP202 with 1.8A max current (HiBy R3Pro has AXP202 https://www.head-fi.org/threads/hiby-r3-pro-portable-bluetooth-dap.916299/post-17418187 ). Or even AXP228 like Cayin N3Pro has (USB3.0-compatible flash charger up to 2.2A charge current).if anyone is interested in this i just tested v3 charging and it charges with 4.95v and 1amp at 5.2w and this is the fastest that can go
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