What voltage should I recharge my battery at

[muckington]

Have one of these batteries

Lion Battery 679 - 105Ah | Euro Car Parts

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Was wondering what is a safe voltage messure to disconnect the battery and recharge it please?

 

[jj4091]

I never bother disconnecting mine, just connect the charger, then don't have to re-enter radio codes etc.

 

[EFLImpudence]

Was wondering what is a safe voltage messure to disconnect the battery and recharge it please?

As said, there is no need to disconnect the battery to charge it but what exactly did you mean?

You can disconnect the battery whatever the voltage.

 

[Rodders53]

If using as a Leisure / RV battery for off grid 12V services and then taking in to a building for recharging (using a suitable smart charger) the 'rule of thumb' is to NEVER discharge below 50% State of Charge for longevity.
For that maintenance free Ca/Ca lead acid construction:

Open circuit (no load) Volts of 12.238 V at -1.1 C or 12.300 V at 26.7 C

(For reference 100% SoC is 12.738 and 12.800 V at the two cited temperatures.)
Numbers from a 2014 batteryfaq spreadsheet I downloaded.

One can discharge deeper but there will be consequences. (Fewer if recharged shortly after the discharge than if left in that state for some time).

 

[SUNRAY]

I never bother disconnecting mine, just connect the charger, then don't have to re-enter radio codes etc.

Are radio codes still a thing?

 

[ericmark]

Lead acid I know, but Lion I would hope charging is built into the battery, but never tried using one.

 

[jj4091]

Are radio codes still a thing?

They are in my Rover

 

[JohnD]

The price of that looks similar to a lead acid. They used to be much more expensive. Does it have advantages?

 

[robinbanks]

NEVER discharge below 50%

For a lead acid battery even that may be pushing it, though dedicated leisure batteries are more resistant to getting ruined by deeper discharges than normal starter batteries.

If deep discharges are likely, a li-ion one can be discharged much further and will probably pay for itself upon the first deep cycle that would ruins a lead acid battery and mandate its replacement

 

[davelx]

Lead acid I know, but Lion I would hope charging is built into the battery, but never tried using one.

"Lion" is the brand name, it's not a Li-ion (Lithium Ion) battery!

 

[ericmark]

If lead acid, then charge when voltage drops to 12.8 volts, and stop when it hits 14.4 volts, if the charger can't do stage charging then float charge at 13.8 volts.

 

[JohnD]

"Lion" is the brand name, it's not a Li-ion (Lithium Ion) battery!

Attempted deception?

 

[Harry Bloomfield]

Was wondering what is a safe voltage messure to disconnect the battery and recharge it please?

13.8v to maintain it in a charged state, 14.4v to charge it. Don't discharge it more than 50% of it's capacity, it will quickly ruin it, and never leave it in a discharged condition, ever - recharge, as soon as it has been used.

 

[Rodders53]

Lead acid I know, but Lion I would hope charging is built into the battery, but never tried using one.

LION is the battery brand not the chemistry - as you'd know if you'd followed the link.

It's also a LEISURE flooded wet maintenance free Ca/Ca type.

Attempted deception?

No they've been around for donkeys years (1930s Australia) long before lithium battery technology. Not the best reputation for quality though - at least here in the UK.

charge when voltage drops to 12.8 volts

Errm 12.800 Volts is fully charged open circuit / no load voltage at 26.7 C for the Ca/Ca leisure lead acid linked to... (Or almost all lead acids). So one can't use it at all if that rule were followed.