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Why not batteries instead of power supplies?

I read about issues with power supplies, like noise from AC outlets, ripples in voltage etc.

Why not just use a large battery that can be recharged? If batteries can power cars, they can for sure power amplifiers.
defiantboomerang

Showing 1 response by randy-11

randy-11
1,913 posts
 
I think we'll see more of this and Powerwall is just the tip of the iceberg.

But a DC power supply will not get rid of noise problems that originate from inside your house.
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