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TAA5412-Q1: SCH review

Part Number: TAA5412-Q1

Dears,

  Could you help to review SCH and confirm some questions?

SCH

285ba59e4a2ea4ba27e893d16f25f558.png

question,

  1. Should these four pins be grounded or left floating when not in use

bfe048635df58aadff19e3d39d9f7ca1.png

2. Is it necessary to connect this VBAT and can it be left unconnected?

e0c003a1803f67f1b665c2cc627ad559.png