After packing the car battery in cloth, place it in a box slightly larger than the object itself. Make sure to place battery on its bottom and not to place it upside down. Once the battery is inside the box, take newspaper and pack it tightly around all sides, securing the device in place so it does not get tossed around during transport.
No matter where or what vehicle you place battery, assure you put it in a secure spot, so it stays in place. Try to keep the boxed battery away from other items in the case the lead acid seeps through the covering and box and onto adjacent materials that could cause damage.
The main mitigation for this is one of two ways. First is to encapsulate the battery inside a capsule which is then vented to the outside of the cabin. Secondarily is to get a battery which does not vent, such as an AGM or Lithium. AGM is a little more expensive than a regular lead acid.
Yes, all lead-acid car batteries ventilate when installed in closed areas such as trunks or under seats at the back. This is a precautionary measure to ensure probably dangerous gases, like hydrogen, that might emanate from them during charging do not accumulate.
Gas Emission: On charging, a lead-acid battery has the ability to emit hydrogen and oxygen gases. If these gases collect, they may have the risk of explosion in case. Pressure Build-Up: These gases may build pressure in a closed area, which has the tendency to break or rupture the battery during leakage.
Venting Tubes: Most lead-acid batteries are fitted with vent tubes, which must be routed to a position outside the vehicle. This allows the gas to safely vent. Location of Installation: Where a battery is installed under seats or in the trunk, a good path for the air flow needs to exist. Additional ventilation holes may be drilled if required.