I've often been asked about power supply compatibility, so following is a summary of the attributes to consider when swapping or replacing adapters. I've also seen people throw out equipment just because these cheap and relatively unreliable power bricks fail, while getting a replacement DC adapter would be much cheaper and easier.

AttributeSymbolCompatibility notes
voltageVMust match
currentAPSU can be larger
polarity⊖──❨●──⊕Usually needs to match
type𝌃Regulated PSU can supply any device

DC power supply notes

© Dec 16 2010