Datasheet CR2450 (EEMB) - 6

CR2450 Datasheet EEMB Li-MnO2 Battery
(Edition: Apr. 2016)
8. Memory Backup Circuit Design Suggestion
A primary lithium battery is not rechargeable, when used for memory backup in combination with another power source; current may flow into the battery from the other source. A protection diode and resistor into the circuit is needed to avoid battery charging or over discharging. Select a silicon diode or a diode with minimum leakage current, and design the circuit so that the amount of charging due to leakage current will not exceed 2% of the nominal battery capacity over the total period of use. While used for memory backup, the following circuit shall be applied:
9. Matters Needing Attention
Strictly observes the following needing attention. EEMB will not be responsible for any accident occurred by handling outside of the precautions in this specification.
! Caution
 Use Nickel-plated iron or Nickel-plated stainless steel for the terminals that contactthe battery.  Make sure that terminal contact pressure is 50g minimum, for a stable contact.  Keep the battery and contact terminal surfaces clean and free from moisture and foreign matter.  Before inserting the battery, check the battery contact terminals to make sure they are normal, not bent or damaged. (Bent terminals may not make good contact with the battery or may cause shortcircuit.) 6 Document Outline EEMB CO., LTD Specification Battery Structure Scope Features and Applications Battery Basic Characteristics Performance and Test Methods Characteristics Curve Matters Needing Attention ! Caution ! Danger ! Warning ! Storage and Mount Overlapping Batteries Batteries put in a Metallic Container or on a Meta When a Battery is Held with Tweezers When Battery Lead Plates Touch Each Other Solder Bridges Short-circuited though Soldering Iron Shorts through Piled Circuit Board Discharge through Conductive Electrostatic Prevent Improper Battery Mounting Polarity Solder