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how do i make the best mobile charger ? Answered

there are so many designs available which design is the best and economical to charge?

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Sparkington

9 years ago

Buy a charger for your phone from a $1 dollar store.

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steveastroukSandisk1duo

Answer 9 years ago

....which is not going to be "best" by any means, a 7805 needs at least 7V on the input to get 5 out, and phones take 100mA to charge, so you are wasting power needlessly, not forgetting the transformer's dissipation. Why not pay the dollar ?

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Sandisk1duosteveastrouk

Answer 9 years ago

how much power do you really waste? you waste 2v+ at 1.5 amps, so that's 3 W wasted and really, how often do you charge your phone? 1-2 hours every week? if you used it for a year, you would waste 336W every year, and that costs: $0.06