Seems like a power cycle fixed the issue (turning the computer off, unplugging the MagSafe, holding the power button for 10 sec, plugging MagSafe back in).

I've got a problem with the second MBA 2017 I did a battery replacement on. Replaced the battery, charged to 100%. Drained the battery and waited 5+ hours. Now it's stuck on 1% and won't charge. I've tried SMC reset by opening it up again, disconnect the new battery, hold the power button for 5 sec, connect the battery again but without any luck. Any suggestions?