completely discharged lead acid battery

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I wanna ask how can I charge completely discharged lead acid battery???

When fully discharged, lead acid batteries tend to damage themselves if left that way. There's some things you can do, but they don't always work. Google for `revive lead acid battery' for some ideas. dougmc 16:05, 27 April 2007 (UTC)Reply
Please refer to the article about lead batteries for information about recharging deep discharged lead batteries. --ArticCynda (talk) 14:37, 18 March 2010 (UTC)Reply

Different understanding of Trickle Charge

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Most articles describes Trickle Charge as a methode to keep a battery charged at a high level, quasi a counterbalance to the self-discharge. But this is not quite correct! Trickle Charge indeed is used to recover a deep discharged battery until a sufficient state of charge for "normal charging" is reached. This is carried out by a reduced charging current (30 ... 150mA). —Preceding unsigned comment added by 84.154.74.51 (talk) 14:10, 11 June 2009 (UTC)Reply

Merge proposal: Float voltage into Trickle charging

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The Float voltage article does at least cite one source, but it doesn't define float voltage. It does define float charging, which redirects to here. So let's put the meager contents together and make it more sensible. That source will be a good one for trickle charging. Dicklyon (talk) 18:11, 7 January 2011 (UTC)Reply

  • No, do not merge the articles as they are two different types of charges. Trickle does not stop attempting to charge after 14v is reached and can destroy or even explode some smaller type batteries such as lawn & garden batteries. A float charge, on the other hand, will stop charging after the battery reaches full charge and will only "kick in" to charge when the battery drops a couple of volts. If someone was to glance at an article containing both types of charges and got the impression that float and trickle were the same they could could destroy their battery or worse yet, be hurt. — Preceding unsigned comment added by 72.95.109.106 (talk) 12:31, 23 February 2012 (UTC)Reply
  • Remove both articles and place them under Battery Charging. What has been created is an unnecessary specialization of focus upon these terms, when they obviously and most correctly have to do with the same basic process; that of charging batteries. - KitchM (talk) 17:05, 14 October 2016 (UTC)Reply
  • It would be OK to try to merge these articles, because they need to share a lot of content. No one can understand fully either of the two without understanding the other. But I fear that if both articles got merged into a giant article about all aspects of battery charging, readers would have a hard time locating this specialized content...-71.174.185.30 (talk) 16:54, 1 May 2017 (UTC)Reply

Trickle Charge vs Float Charge

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Need better article content about Trickle Charge vs Float Charge. Seems like Float Charge means applying a constant (top-off) voltage, intended to keep battery fully charged. Trickle Charge seems to mean applying a rather constant (low) current, hoping that this will keep a battery fully charged -- without inadvertently overcharging, which would be bad. Which all leads to needing to understand when Trickle Charging is OK, or not so good... For example, solar chargers for cars that sit for a long time between uses -- what features would make such equipment good or bad for the life of the lead acid battery.-71.174.185.30 (talk) 16:59, 1 May 2017 (UTC)Reply

Article seems both vague and contradictory or confusing

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  • Vague in that "rate" as used in the first line does not say current (in amperes). (to distinguish from float charging which is based on voltage rather than current)
  • Contradictory/confusing, in that it says it is the rate that balances the self-discharge rate, but also says that it causes electrolysis (gassing) which self-discharge wouldn't. - Rod57 (talk) 22:20, 4 June 2023 (UTC)Reply