MC33 RFID and MC33X Battery Pack, Lithium Ion, PP+ MC3300R High Capacity Battery Helps you keep your mobile computer ready to use anytime Save your precious time by recharging the battery instead of running to the store each time you run out of batteries Smaller and lighter than other rechargeable batteries, proving ideal for portable devices Delivers 3.6 V DC to your compatible mobile computer, ensuring that your device is ready to use when needed