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Thread: Using a PB137 for stand-by agm battery charger

  1. #1
    Enlightened Starflex's Avatar
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    Default Using a PB137 for stand-by agm battery charger

    Hi All,

    Quick one - problem of a group of people.

    Motorbike not used very often, or notorious for battery drain due to alarm, etc. as a result, after 30 days battery is almost flat.

    No power point available, so no option to use a stand-by charger (C-Tek and the like). However, a bit of sunlight and artificial light in the garage may give power to a small solar panel.

    Would a simple PB137 IC work to create a stand- by battery charger, or would that ruin the battery over time?

    Waveform of the modern standby charger is different (more pulsed), hence my question.

    Thanks!

  2. #2

    Default Re: Using a PB137 for stand-by agm battery charger

    The battery is damaged more by repeated draining to zero and recharging than it likely would be by any charger source regardless of the waveform. I would measure the standby current using a multimeter to see if the charger could keep up with the drain from the alarm system.
    Last edited by lightfooted; 09-15-2019 at 01:25 AM.

  3. #3
    Enlightened Starflex's Avatar
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    Cagliari, Italy
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    Default Re: Using a PB137 for stand-by agm battery charger

    Agree, the balance must be positive. And the reason to use such a system is exactly to avoid cycling the battery

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