Patent ID: 7648792

Claim:
A portable fuel cartridge for storing a fuel for use in a portable device having a portable fuel cell system, the portable fuel cartridge comprising: an elongated housing having a length and a width, wherein the length is substantially larger than the width; a volume internal to the housing for storing the fuel; an elongated mechanical connector coupled to the housing that extends along the elongated length side of the housing, the mechanical connector being configured suitably to facilitate fastening the housing to an outside wall of the portable device along a length of the connector such that the fuel cartridge is positioned external to the portable device along a side of the portable device and is not received within the portable device; a fuel connector configured to permit transfer of the fuel between the internal volume and the portable fuel cell system; and an air filter distinct from the elongated mechanical connector, proximate to the mechanical connector and mechanically coupled to the housing, configured to intercept cooling air before the portable device receives the air, wherein the portable fuel cartridge is configured to guide air intended for delivery to the portable device through the air filter and through the connector such that filtered air is delivered to the portable device.