Chapter 3: Getting to Know the EP10
Storing Batteries
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Psion EP10 Hand-Held Computer User Manual
• When the EP10 is switched off, it goes into a low-power, suspend state but continues to draw a small
amount of power from the battery. This should not be an issue unless the EP10 is left in suspend state
for more than a week – for long-term storage, the battery should be removed.
3.8.1 Storing Batteries
Long term battery storage is not recommended. If storage is necessary:
• Always try to use a ‘first-in first-out’ approach to minimize storage time.
• Lithium-Ion batteries age much faster at elevated temperatures. Store batteries at temperatures
between 0° C and 20° C.
• Always charge batteries to at least 40 to 60% before storing them. Batteries can be damaged by an
over-discharge phenomenon that occurs when an empty battery is stored for a long period of time
such that the cell voltage drops below a lower limit.
• To minimize storage degradation, recharge stored batteries to 40 to 60% every 4 or 6 months to
prevent over-discharge damage.
• A ‘never used’ Lithium-Ion battery that has been stored for 3 years may have limited or no useful life
remaining once put into service. Think of batteries as perishable goods.
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