I wish that was the answer for me too. Both in their case for several days. I go use them, case is 90% full, left is around the same, but right shows 27%. Confused, I closed and open the case again. Then it showed 70%. Went out and in 45 minutes of listening to podcasts, the right had no more batteries. I will have to call Apple and ask. It’s annoying. Just got them a week ago.
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=== Update (01/09/2021) ===
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Suggest you guys ask for a replacement from wherever you purchased them. I called Apple and they couldn’t help beyond troubleshooting. They suggested I get a replacement from the vendor. I had bought them on Amazon and requested a replacement. New Airpods work flawlessly.
I wish that was the answer for me too. Both in their case for several days. I go use them, case is 90% full, left is around the same, but right shows 27%. Confused, I closed and open the case again. Then it showed 70%. Went out and in 45 minutes of listening to podcasts, the right had no more batteries. I will have to call Apple and ask. It’s annoying. Just got them a week ago.