A system comprising: a portable ambulatory fluid delivery device, the device comprising: a dispensing unit to dispense therapeutic fluid, the dispensing unit including: one or more rechargeable batteries; a housing to retain the one or more rechargeable batteries, with at least a portion of the housing being securable to a skin of the user; a reservoir to contain the therapeutic fluid; a driving mechanism to cause delivery of the therapeutic fluid from the reservoir to a user's body; at least one electrical connector to be coupled to a recharging unit to direct electrical power received from the recharging unit to recharge the one or more rechargeable batteries; and a recharging unit comprising: at least one electrical connector configured to couple to at least a part of the dispensing unit of the fluid delivery device to provide electrical power to the dispensing unit to recharge one or more rechargeable batteries disposed in the dispensing unit; and a charger to direct the electrical power from a power source to the at least one electrical connecter of the recharging unit, said charger further configured to alter the electrical power directed from the power source characterized in that: the dispensing unit also includes a communication module to communicate data signals representative of data relating to operation of the dispensing unit, the communication module configured to communicate the data signals substantially concomitantly with receipt of the electrical power from the recharging unit; and the recharging unit further comprises a communication module to communicate data signals representative of data relating to operation of the dispensing unit, with the communication module of the recharging unit being configured to communicate the data signals between the dispensing unit and the recharging unit and to another dispensing unit coupled to the recharging unit. a portable ambulatory fluid delivery device, the device comprising: a dispensing unit to dispense therapeutic fluid, the dispensing unit including: one or more rechargeable batteries; a housing to retain the one or more rechargeable batteries, with at least a portion of the housing being securable to a skin of the user; a reservoir to contain the therapeutic fluid; a driving mechanism to cause delivery of the therapeutic fluid from the reservoir to a user's body; at least one electrical connector to be coupled to a recharging unit to direct electrical power received from the recharging unit to recharge the one or more rechargeable batteries; and one or more rechargeable batteries; a housing to retain the one or more rechargeable batteries, with at least a portion of the housing being securable to a skin of the user; a reservoir to contain the therapeutic fluid; a driving mechanism to cause delivery of the therapeutic fluid from the reservoir to a user's body; at least one electrical connector to be coupled to a recharging unit to direct electrical power received from the recharging unit to recharge the one or more rechargeable batteries; and a recharging unit comprising: at least one electrical connector configured to couple to at least a part of the dispensing unit of the fluid delivery device to provide electrical power to the dispensing unit to recharge one or more rechargeable batteries disposed in the dispensing unit; and a charger to direct the electrical power from a power source to the at least one electrical connecter of the recharging unit, said charger further configured to alter the electrical power directed from the power source at least one electrical connector configured to couple to at least a part of the dispensing unit of the fluid delivery device to provide electrical power to the dispensing unit to recharge one or more rechargeable batteries disposed in the dispensing unit; and a charger to direct the electrical power from a power source to the at least one electrical connecter of the recharging unit, said charger further configured to alter the electrical power directed from the power source characterized in that: the dispensing unit also includes a communication module to communicate data signals representative of data relating to operation of the dispensing unit, the communication module configured to communicate the data signals substantially concomitantly with receipt of the electrical power from the recharging unit; and the recharging unit further comprises a communication module to communicate data signals representative of data relating to operation of the dispensing unit, with the communication module of the recharging unit being configured to communicate the data signals between the dispensing unit and the recharging unit and to another dispensing unit coupled to the recharging unit. the dispensing unit also includes a communication module to communicate data signals representative of data relating to operation of the dispensing unit, the communication module configured to communicate the data signals substantially concomitantly with receipt of the electrical power from the recharging unit; and the recharging unit further comprises a communication module to communicate data signals representative of data relating to operation of the dispensing unit, with the communication module of the recharging unit being configured to communicate the data signals between the dispensing unit and the recharging unit and to another dispensing unit coupled to the recharging unit.