... , cellphone, MP3, MP4, digital cameras. can be used as the charger and spare batter 1. This product is a portable external ... , digital cameras.2. This power can be used as the charger and spare battery, the voltage and the current can be ... of the notebook PC on the market!3. It can not only directly supply the notebook PC, but also charge the ... power for you at any time. Portable battery pack and charger