According to one exemplary embodiment, a buffer circuit is configured to receive a supply voltage and an input reference voltage, the buffer circuit has a first FET operating in saturation region where the source of the first FET is coupled to the output reference voltage. The lid is configured to be selectively removable from the jar. The battery further includes an antenna configured to execute the contactless communication as the transponder; and an antenna configured to execute the contactless communication as the readerwriter. Furthermore, all the process including the control of temperature, can be executed with one continuous operation by this aspect of the invention. The first bid is stored for at least one period of time. The thermal regulation system maintains the battery at a desired temperature range to encourage efficient charging and prolonged battery life.