Channel your inner Scav (or your ultra broke early wipe character) with this Sling Bag.  Will it fit much loot?  No.  But it can fit a car battery at least (probably not, only in Tarkov).
 
BDT Bulldog® Tactical Ammo & Accessory Bag
– Adjustable/Removable Universal Holster
(Back Pocket)
– Heavy-Duty Locking Zippers
– Adjustable Sling Strap
– MOLLE Webbing
– Multiple Compartments W/ Organization
Pockets
– Water-Resistant Durable Outer Shell
– Compression Straps
– Ambidextrous Design
– Gripper Back Panel Prevents Sliding
–Khaki
 
10"H X 7.5"W X 6"D