A portable battery pack comprising: a wearable pouch and one or more batteries enclosed in the wearable pouch; wherein the one or more batteries include: a battery element; a battery cover including a rectangular compartment sized to receive the battery element and a top hat style rim around an entire perimeter of the battery cover; a battery back plate attached to the top hat style rim of the battery cover; and one or more flexible omnidirectional leads, wherein each of the one or more flexible omnidirectional leads comprises a connection portion and a wiring portion, wherein the connection portion is any type or style of connector needed to mate to equipment to be used with the portable battery pack, wherein a flexible spring is provided around the wiring portion, wherein the wiring portion and the flexible spring are held securely in a channel in the battery cover via a clamping mechanism such that a portion of the flexible spring is positioned inside the battery cover and a portion of the flexible spring is positioned outside the battery cover; wherein the wearable pouch includes: a closeable opening through which the one or more batteries are operable to be removed from the wearable pouch; one or more openings through which the one or more flexible omnidirectional leads from the one or more batteries can be accessed; and a pouch attachment ladder system (PALS) operable to attach the wearable pouch to a load-bearing platform. a wearable pouch and one or more batteries enclosed in the wearable pouch; wherein the one or more batteries include: a battery element; a battery cover including a rectangular compartment sized to receive the battery element and a top hat style rim around an entire perimeter of the battery cover; a battery back plate attached to the top hat style rim of the battery cover; and one or more flexible omnidirectional leads, wherein each of the one or more flexible omnidirectional leads comprises a connection portion and a wiring portion, wherein the connection portion is any type or style of connector needed to mate to equipment to be used with the portable battery pack, wherein a flexible spring is provided around the wiring portion, wherein the wiring portion and the flexible spring are held securely in a channel in the battery cover via a clamping mechanism such that a portion of the flexible spring is positioned inside the battery cover and a portion of the flexible spring is positioned outside the battery cover; a battery element; a battery cover including a rectangular compartment sized to receive the battery element and a top hat style rim around an entire perimeter of the battery cover; a battery back plate attached to the top hat style rim of the battery cover; and one or more flexible omnidirectional leads, wherein each of the one or more flexible omnidirectional leads comprises a connection portion and a wiring portion, wherein the connection portion is any type or style of connector needed to mate to equipment to be used with the portable battery pack, wherein a flexible spring is provided around the wiring portion, wherein the wiring portion and the flexible spring are held securely in a channel in the battery cover via a clamping mechanism such that a portion of the flexible spring is positioned inside the battery cover and a portion of the flexible spring is positioned outside the battery cover; wherein the wearable pouch includes: a closeable opening through which the one or more batteries are operable to be removed from the wearable pouch; one or more openings through which the one or more flexible omnidirectional leads from the one or more batteries can be accessed; and a pouch attachment ladder system (PALS) operable to attach the wearable pouch to a load-bearing platform. a closeable opening through which the one or more batteries are operable to be removed from the wearable pouch; one or more openings through which the one or more flexible omnidirectional leads from the one or more batteries can be accessed; and a pouch attachment ladder system (PALS) operable to attach the wearable pouch to a load-bearing platform.