Picking the right charger?


Last Updated: 2013-06-30 19:13:55
  1. isrhammer

    isrhammer Well-Known Member

    Dear Androids,

    I using my SGS 1 alot and specially when i'm out, I would like to buy a solar charger but not sure how to fit it to my phone.

    My phone battery has 1500 mAh and i'm not sure if it matters which charger i choose (there are diffrent mAh on every charger).

    Do I need to fit the mAh to my battery specifications or can I use which ever charger I want?

    How does it goes?

    thx

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  2. Harry2

    Harry2 Well-Known Member

    I recommend a battery power pack like Anker 5600mAh.
    It'd charge your phone's 1500mAh battery about three times.

    I don't recommend solar chargers with a build-in battery, better a power pack and a separate solar panel ... about the reason see below ... :)
    Charging the phone with such a solar charger is not the problem :)

    But charging the the build-in battery of the solar charger by using the sunshine, that is a problem ;)
    It works, but, with a reasonably build-in battery, its panel needs about three sunny days to charge its build-in battery.

    The reason for this delay is a general design error of this kind of solar chargers with build-in batteries.
    The panel needs the sun, but the in-build Li-Ion battery hates the heat of the sun.

    A Li-Ion battery to charge above temperatures of +45C (+113F) will be dangerous, so the charging circuit will shut off the charging when the battery reaches this temperature.
    So there will be delays, because when the sun is the brightest the charging of the solar charger will be shut off :(

    Far better are solar panels without a build-in battery. They can charge the phone directly or can charge a separate mobile charger's build-in battery for later use.

    For such a "stand-alone" solar panel one should choose high quality.
    Cheap panels won't become a joyfully toy ;)
    Harry
  3. chanchan05

    chanchan05 The Doctor Guide

    In order for a charger not to damage a li-ion battery, it needs to have a charge rating of 0.3-1.5C of the phone's mah. Basically, it needs to have an mah output that's 0.3-1.5x the mah capacity of a phone.
    Harry2 likes this.
  4. Harry2

    Harry2 Well-Known Member

    Slip of the pen (or finger :) ): "mA output" would be right.

    Harry
  5. isrhammer

    isrhammer Well-Known Member

    I am talking about a solar charger only! without a built in battery. thx

    Great answer, i'll use that calculation. Thank you very much mate.

    Nice sharpening :) thx
  6. DaggaDraad

    DaggaDraad Active Member

    Can you give me names of high quality stand-alone solar chargers, please?

    Tx
  7. Harry2

    Harry2 Well-Known Member

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