some bat rope, bat cuffs, and bat s&m outfit... j/k. i think that the convinience of having whatever you need the moment you need it is one of the perks of being fictional. so, everything he needs should be there... even the chevron card for his batmobile.
Spoiler:
yes, i realize that he has his own personal gas pump... i was just pointing out that he has everything in the belt.
# Batarangs
# Bola
# Wall-penetrating grapnel
# Blowgun
# Caltrops
# Bat-cuffs
# Gas pellets
# Aerosol sprayer
# Bat-grenades
# Batplane
# Tracers
# Rebreather
# Universal tool
# Crime scene kit
# Portable computer
# Bat-pda
# Radio receiver/tranceiver
# Digital cameras
# Grappling hook
# Cables
# Bugs
# Finger light
# Starlite nighvision gear
# Multifunction binoculars
# Gas masks
# Sprays
# Chemical agents
# Razorwings
# First aid kit
# Synthetic kryptonite
# Bat-caller
# Kryptonite ring
# Sonic weapons
Not on the same time, of course.😄
From here.