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  1. OGz

    How to limit the max voltage in a charging circuit?

    https://www.amazon.co.uk/Charger-electric-Electric-batteries-5-5x2-1mm/dp/B07K9JX7CN would this do the job? Is 2A enough for a 3000mAh bank of batteries?
  2. OGz

    How to limit the max voltage in a charging circuit?

    Now we get to heart of the issue with the tools! Yes they're ancient - about 2006/2007, but they're Bosch Pro and very well made - drill, jigsaw and circular saw. I'm looking into upgrading to Lithium Ion, but here's the thing: the tools are 24v so... 3.7 x 7 would give me a nominal operating...
  3. OGz

    How to limit the max voltage in a charging circuit?

    Thank you both... I've seen the light, yes life is too short to worry about laptop batteries! On the other hand, the tool batteries really are an issue, they start to give diminishing returns within a few months and past 12 months are fairly useless. So.. still open to suggestions.
  4. OGz

    How to limit the max voltage in a charging circuit?

    I'm looking for a simply way to limit the max charging voltage for an existing charging circuit. I've heard this can be done with diodes, but am a bit clueless as to how to calculate the rating of the diodes, and/or whether this would be the ideal solution, since I don't want to cause any...
  5. OGz

    Undercharging lead acid starter batteries

    Hey all... I think I may have discovered the root cause of my problem. There is a draw of 0.2A on the battery even when the ignition is turned off. I've read online briefly that this may be caused by a defective alternator diode, which apparently means that the battery is left trying to charge...
  6. OGz

    Undercharging lead acid starter batteries

    Electrolyte levels are fine. When you say re-freshen the acid, I presume you mean top up with distilled water to compensate for evaporation due to the high charge? Haven't checked the SG as yet...
  7. OGz

    Undercharging lead acid starter batteries

    Oldest (the one I'm trying to recondition) is 3 years. Other two are two years and one year - and yes, the performance in each case is worse with age, so the newest one takes more of a charge and is more likely to have enough voltage to start the vehicle.
  8. OGz

    Undercharging lead acid starter batteries

    Hi, I have three vehicles that very rarely are used for long runs. This means that in general the batteries are under-charged. I would expect 12.8v at rest from a fully charged battery in good condition. Mine are more like 12.2v. What I have noticed is that when the vehicle is started up and...

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