Abstract: An emergency position indicating radio beacon that includes a waterproof rigid housing, antenna, a retention carriage strap securely mounted around its exterior periphery on a spool in a storage position. In an emergency the user can unwind the retention carriage strap and form an adjustable loop in the strap using hook and loop fasteners to firmly attach the strap connected to the EPIRB housing to the user's arm that allows a user to transport the radio beacon with the retention carriage strap in a hands-free configuration.

Abstract: A protective metal enclosure box for lithium batteries that includes batteries subject to fire and explosion comprising a rigid metal covered box that includes an aluminum honeycomb grid core mesh that can receive multiple individual batteries spaced apart from each other and protected from each other thermally and from explosion. The protective battery pack box includes a pair of printed circuit boards for interacting with the batteries for transmitting voltage and amperage outside of said battery pack.

Abstract: An external battery pack for protecting against a battery fire or battery explosion, said battery pack connectable to an emergency locator transmitter (ELT) typically mounted in an aircraft. The external replaceable battery pack has a protective metal enclosure and a removable metal cover. The box includes an aluminum honeycomb grid core mesh with passages, each sized to receive a single battery and a pair of printed circuit boards on top and bottom to receive battery power, voltage and current, from multiple batteries for use with an ELT. By using smaller and more batteries together, the possibility of a catastrophic failure is greatly eliminated or reduced in that a smaller battery have a lesser fire or explosion potential. The batteries are isolated from each other from excessive heat or destruction by explosion.

Abstract: An emergency position indicating radio beacon that includes a waterproof rigid housing, antenna, a retention carriage strap securely mounted around its exterior periphery on a spool in a storage position. In an emergency the user can unwind the retention carriage strap and form an adjustable loop in the strap using hook and loop fasteners to firmly attach the strap connected to the EPIRB housing to the user's arm that allows a user to transport the radio beacon with the retention carriage strap in a hands-free configuration.