An infusion pump system comprising: an infusion pump comprising: at least one disposable portion of the infusion pump; and at least two reusable portions, comprising a first reusable portion and a second reusable portion , of the infusion pump, each of the first and second reusable portions of an infusion pump configured to connect to the at least one disposable portion; a charging device configured to receive at least one of the first or second reusable portions, and the remote interface, wherein the charging device configured to recharge a pump battery of the at least one of the first and second reusable portions, and wherein the charging device configured to recharge an interface battery in the remote interface; and characterized by a remote interface comprising a touch screen, the remote interface in wireless communication with the first and second reusable portions, the remote interface configured to provide user instructions to the first and second reusable portions, wherein the remote interface configured to receive user input through the touch screen indicating a change from a first reusable portion to the second reusable portion, wherein the first reusable portion is configured to send a current insulin on board information to the remote interface and the remote interface is configured to receive this information and start counting time with respect to the current insulin on board, wherein once the second reusable portion is connected to the disposable portion, the remote interface is configured to send the insulin on board information to the second reusable portion, with a time stamp. an infusion pump comprising: at least one disposable portion of the infusion pump; and at least two reusable portions, comprising a first reusable portion and a second reusable portion , of the infusion pump, each of the first and second reusable portions of an infusion pump configured to connect to the at least one disposable portion; at least one disposable portion of the infusion pump; and at least two reusable portions, comprising a first reusable portion and a second reusable portion , of the infusion pump, each of the first and second reusable portions of an infusion pump configured to connect to the at least one disposable portion; a charging device configured to receive at least one of the first or second reusable portions, and the remote interface, wherein the charging device configured to recharge a pump battery of the at least one of the first and second reusable portions, and wherein the charging device configured to recharge an interface battery in the remote interface; and characterized by a remote interface comprising a touch screen, the remote interface in wireless communication with the first and second reusable portions, the remote interface configured to provide user instructions to the first and second reusable portions, wherein the remote interface configured to receive user input through the touch screen indicating a change from a first reusable portion to the second reusable portion, wherein the first reusable portion is configured to send a current insulin on board information to the remote interface and the remote interface is configured to receive this information and start counting time with respect to the current insulin on board, wherein once the second reusable portion is connected to the disposable portion, the remote interface is configured to send the insulin on board information to the second reusable portion, with a time stamp. <EOS>