Do you have already a power bank? maybe you don’t need to buy a new one!
nanosaur works with a standard power bank, if your power bank support Power Delivery will be great for future nanosaur release.
Download Download this the nanosaur-powerbank.pdf to check if your power bank fit the nanosaur slot.
The maximum size allowed for nanosaur is:
|Length||95 mm to 105 mm||3,74 in to 4,13 in|
|Height||65 mm||2,6 in|
|Width||24 mm||0,9 in|
You can use this image such a reference.