Found interesting battery that I found to be an interesting candidate for a batter power supply http://www.ebay.com.au/itm/Cool-Multi-function-DC-5V-9V-12V-3-In-1-Rechargeable-Li-ion-Battery-Pack-Black-/331804355658?hash=item4d4114ac4a:g:ByEAAOSwmmxW6Sbv what do guys think. I'm thinking to use it for my haggerman cornet3 using it's 9v output and a pre preamp I'm thinking to build. Is there such thing as noisy battery supply?
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