The ProxiPen 2 reads radio frequency identification (RFID) tags and other transponders automatically and can fully satisfy the data-collection needs of both commercial and industrial applications. The ProxiPen 2 can read RFID tags even if they are wet, frosty, dirty, greasy, or painted over. It autosenses and reads RFID tags whenever they come within its reading range. Memory capacity (4,063 readings) can be used for long periods in the field without the need for frequent downloading. The ProxiPen 2 delivers 50,000 data readings from one “AA” battery, which can be charged by the user without tools or loss of data (stored in non-volatile memory). The anti-tampering features discourage unauthorized battery removal.