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  1. Do I really need an auto cut off circuit for my battery when my charger only outputs 13V and 1A at max. The battery I want to charge is a 12V 7Ah Sealed Lead Acid. I heard that the cut off for lead acid battery is at 13.7V, so it should be fine right?

  2. I also want to know if I don't use a cut off circuit can I leave the battery for charging overnight.

  3. And in case I need an auto cut off circuit the would any one suggest one that has both upper and lower threshold i.e cuts off at 13V and powers back on 11.5V etc.

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  • \$\begingroup\$ 1 yes, 2 if 1 is yes then yes but if 1 is no then no, 3 check ebay... \$\endgroup\$ – Solar Mike Feb 2 at 13:07
  • \$\begingroup\$ can you explain @SolarMike \$\endgroup\$ – Hamza Khan Feb 2 at 13:10
  • \$\begingroup\$ Question 1 yes you do. Question 2 yes if it has a cut off, if no cut off then no. Question 3 lots on ebay. \$\endgroup\$ – Solar Mike Feb 2 at 13:16
  • \$\begingroup\$ Your first question is confusing. If your charger provides 13V how could you ever get 13.7V at the battery? \$\endgroup\$ – Elliot Alderson Feb 2 at 14:17
  • \$\begingroup\$ @ElliotAlderson I think that's what they're asking. If the charger can't charge the battery to the full 13.7V, do they still need the cutoff. \$\endgroup\$ – Hearth Feb 2 at 15:16

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