XIAO nRF52840 - Recharging 5v battery? Inductive charging?

Hi guys,

If I understand correctly, this XIAO can recharge batteries through the VIN, right ?

1- In this case does it have to be 5V rechargeable batteries ? Or can I use 3V 18650 ?
2- Any super reliable battery you would recommend for this XIAO ? I need 800-1000ma . Should I use camera batteries ?
3- Any way to use inductive charging on the XIAO ?
Thank you