Interestingly must have gotten a couple factory seconds as mine were both labeled with a 20Ah label on the front but back had the 10Ah 37wh label. When I ordered these I actually had forgotten and thought they were the higher power ones (my mistake) and not the 5v 2A versions. I have cycled both of them twice and they got 31 and almost 33 wh of output to my phone. This is 84 and 89 percent of capacity which is about what one can expect. I get about 3 or 4 days recharging my pixel 7 (from about half) On the charge side they averaged 48.9 and 49 wh which is 76 and 75 percent efficiency based on the 37wh size. power wise I got an output of 5.05v and 1.36A (6.8w) and input recharging of 4.95v and 1.24A (5.7 w) so be prepared for 6 hours to recharge the power bank.

Reply by our customer service

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