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•Never leave dead, old, or weak batteries in the SCP-90. Batteries can leak chemicals that can corrode or damage electronic circuits.
•If you do not plan to power the SCP-90 with bat- teries for several days, or if you plan to power it using only an AC or DC adapter, remove the bat- teries to protect the SCP-90 from possible bat- tery leakage.
Using AC Power
To power the SCP-90 with standard AC power, you need an optional AC adapter, such as RadioShack Cat. No. 273-1654.
Cautions:
•The recommended AC adapter supplies 3 volts and delivers at least 250 milliamps. Its center tip is set to negative, and its barrel plug correctly fits the SCP-90’s DC 3V jack. Using an adapter that does not meet these specifications could dam- age the SCP-90 or the adapter.
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