Well, like I said, voltages can vary from brand to brand and design types.
From the lifeline web site:
Battery Charging:
WARNING: All batteries must be adequately vented during charging to avoid accumulation of explosive hydrogen gasses. Never install or charge in a sealed container or room.
The following charging voltages are recommended for maximum battery life for all Lifeline models.
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Charging Phase 2V Battery -------6V Battery ---------12V Battery
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Bulk/Absorb - 2.37v - 2.40v ------7.10v - 7.20v ------14.2v - 14.4v
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Float ----------2.20v - 2.23v ------6.60v - 6.70v ------13.20v - 13.40v
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NOTES:
1. Use midpoint values for most applications. Lower voltages may be suitable for light-duty applications and higher voltages may be suitable for heavy duty applications.
2. For 24 Volt Systems, multiply 12 Volt setting by 2.
3. Charge voltage should be adjusted if battery temperature varies by more than 10°F from 77°F. Consult website for further guidance (
http://www.lifelinebatteries.com).
Conditioning/Equalizing Charge: 15.5 volts for 8 hours
Conditioning/equalizing should only be done when the battery is showing symptoms of capacity loss. If conditioning/equalizing is necessary, first go through the normal charge cycle. Once the battery is as fully charged as possible, start the conditioning/equalizing charge.
For maximum battery life, a battery must be recharged to 100% capacity. Recharging to less than 100% may result in premature battery failure. Lifeline batteries are not covered under warranty if they are not recharged properly. For more information, please refer to our warranty policy.
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Possibly there are some other specs that they didn't tell me. One thing the tech did say about a question I asked about involving taking my new battery down to like 9.4 volts one time by accident was that I probably wouldn't even be able to tell the battery was even damaged. He claimed the it would take repeat low voltage take downs to cause long term damage. I was happy to hear that even though the web site said different.