Is it possible? Or the device needs at least a kernel to be able to charge? I have a device in bootloop that every 3 seconds it vibrates and I'm not sure if its does not charge because I erased boot and system partitions or because its consume power everytime it vibrates preventing to charge enough for me be able to turn on fastboot mode and fix it.
Assuming you already know what TWRP is, you should just install and boot into it and charge. However in your case you cant install it i guess. So best way is to plug into pc and fastboot mode the device. This will supply it with some power at least and try flashing twrp to it using adb/fastboot services. Then you can boot into twrp and charge the device from there. And if in future you're ever going to touch a phone's system/other important partitions..make sure to install twrp beforehand.
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