None ABM or Flood battery on Prius?

Discussion in 'Gen 3 Prius Main Forum' started by Tekken, May 23, 2021.

  1. Yaesu

    Yaesu Junior Member

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    When the OEM, AGM battery failed I found someone to jump start the vehicle directly on the battery. I drove the Prius home (about 50 miles) and the smell of H2SO4 was very strong. I have used many AGM batteries in vehicles that weren't designed for an AGM battery and several failed within a few years. I wonder if the slightly different charging profiles affect battery life.
     
  2. meeder

    meeder Active Member

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    AGM normally needs 14.7V instead of 14.4V.
    If you never charge it with the correct voltage the battery will lose capacity.
     
  3. sam spade 2

    sam spade 2 Senior Member

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    No sorry but it won't "Lose capacity".
    Unless you define that to mean that it only charges up to maybe 97% of capacity instead of 100.
    A slower charging rate tends to extend life, not diminish it.
     
  4. Tekken

    Tekken Member

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    slow charging seems work better on AGM battery. Slow charge about 1amp on my old AGM battery for overnight and last 5-7days.
     
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