The suitable wall charger for these powerbanks is the Anker 33W PD wall charger; it can fast charge the PD powerbank and devices as well as the slow charging powerbanks such as A1271 and A1268. All of the powerbanks come with a cable that is suitable to charge the power bank; simply use that cable with the suitable wall chargers below to achieve the best recharging results. 

https://www.amazon.com/Anker-Charger-Compact-Foldable-Included/dp/B0B2MMYZPL?th=1

But if you want to buy a wall charger just for slow charging powerbank, please buy any wall charger with 10W-12W of output such as below: 

https://www.amazon.com/Anker-Charger-PowerPort-PowerIQ-Foldable/dp/B071YMZ4LD

https://www.amazon.com/Anker-PowerPort-Charger-Compact-Foldable/dp/B07H8WJCTF

And for Anker 525 Powerbank A1287, the wall charger will be: 

https://www.amazon.com/Charger-Anker-Adapter-PowerPort-iPhone/dp/B07WRKXQ8W

If your powerbank has 20K or more capacity with PD fast charging technology and higher wattage, please check the input requirements of your power bank and buy the wall charger accordingly. 30W, 45W, 65W, 120W and 140W links are below:

https://www.anker.com/products/a2665 (30W wall charger for Anker 537 24K powerbank and others)

https://www.amazon.com/Charger-Anker-Adapter-Supported-Foldable/dp/B08T5QVTKW (Anker 45W wall charger for Anker Powercore+ 26800 mAh and others)

https://www.amazon.com/Anker-Charger-Compact-Foldable-MacBook/dp/B09C5RG6KV (Anker 65W wall charger for Anker 747 Powerbank 26K and others)

https://www.anker.com/products/a2148 (Anker 120W wall charger for Anker 737 Powerbank 24K and others )

https://www.anker.com/products/a2341 (Anker 140W wall charger also suitable for Anker 737 Powerbank 24K and others )

If you have any questions, please feel free to contact Anker Customer support.