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3M
™
 Mobile Projector MP220
  © 2011 3M. All Rights Reserved.
English
Battery Maintenance Tips:
• Remove the battery when the projector will not be used for one week or 
longer.
• Charge and discharge the battery by turning on the projector at least once a 
month.
• When storing the battery for more than a month, store it at 50% charge. 
• Do not store a fully discharged battery because it may lose the ability to be 
recharged.
• Do not store a fully charged battery because it may lose the ability to be 
recharged to fullpower.
Important Note: Use only the 3M specified battery: 78-6972-0053-9