I winterized the MH in late Oct, pushed battery disconnect to store for house batteries and disconnected the neg cable on my chassis battery. Checked house batteries in Feb and they lost 20% SOC. Checked again today and they were only down 10%. Of course in Feb it was in the 20's and today we are up in the 60's. The batteries are still at 90% SOC after 5 plus months sitting with no charge on them. Each year I think this is it the batteries won't make it through the winter because the batteries are 14 years old but it looks like they will make it another year. I really like the 2 6v GC batteries from Sam's Club, I think back in 2007 they were made by Duracell.

Duracell is a re-brand. Perhaps John Controls? A helping hand for warm weather use and storage is to adjust electrolyte density to 1.260This must be done when the battery is brand new. It should be top charged and rested for a day. This can easily add 30 - 50% added lifespan.

I guess I kind of done that inadvertently. I recharge when my batteries get to about 80% SOC with my B&D 40 amp charger, when it says full I float with my onboard Magnatech 950 charger for a few days. I never keep the charger plugged in continually.

The cold will dramatically slow the self discharge.

MEXICOWANDERER wrote:Duracell is a re-brand. Perhaps John Controls? A helping hand for warm weather use and storage is to adjust electrolyte density to 1.260This must be done when the battery is brand new. It should be top charged and rested for a day. This can easily add 30 - 50% added lifespan.In the Sams Clubs I have seen that the Duracells are Deka-East Penn and the Energizers are Johnson Controls. HTH;John

Gjac wrote:I winterized the MH in late Oct, pushed battery disconnect to store for house batteries and disconnected the neg cable on my chassis battery. Checked house batteries in Feb and they lost 20% SOC. Checked again today and they were only down 10%. Of course in Feb it was in the 20's and today we are up in the 60's. The batteries are still at 90% SOC after 5 plus months sitting with no charge on them. Each year I think this is it the batteries won't make it through the winter because the batteries are 14 years old but it looks like they will make it another year. I really like the 2 6v GC batteries from Sam's Club, I think back in 2007 they were made by Duracell.What kind of meter do you have that knows SOC based on temperature?HTH;John

Battery observations of winter storage. | Good Sam Community

Gjac
Explorer III
Apr 07, 2021
I use a multimeter to check SOC. Temperature is measured with a thermometer.
full_mosey
Explorer
Apr 07, 2021
Gjac wrote:
I winterized the MH in late Oct, pushed battery disconnect to store for house batteries and disconnected the neg cable on my chassis battery. Checked house batteries in Feb and they lost 20% SOC. Checked again today and they were only down 10%. Of course in Feb it was in the 20's and today we are up in the 60's. The batteries are still at 90% SOC after 5 plus months sitting with no charge on them. Each year I think this is it the batteries won't make it through the winter because the batteries are 14 years old but it looks like they will make it another year. I really like the 2 6v GC batteries from Sam's Club, I think back in 2007 they were made by Duracell.

What kind of meter do you have that knows SOC based on temperature?

HTH;
John
full_mosey
Explorer
Apr 07, 2021
MEXICOWANDERER wrote:
Duracell is a re-brand. Perhaps John Controls? A helping hand for warm weather use and storage is to adjust electrolyte density to 1.260

This must be done when the battery is brand new. It should be top charged and rested for a day. This can easily add 30 - 50% added lifespan.

In the Sams Clubs I have seen that the Duracells are Deka-East Penn and the Energizers are Johnson Controls.

HTH;
John
time2roll
Nomad
Apr 07, 2021
The cold will dramatically slow the self discharge.
Gjac
Explorer III
Apr 07, 2021
I guess I kind of done that inadvertently. I recharge when my batteries get to about 80% SOC with my B&D 40 amp charger, when it says full I float with my onboard Magnatech 950 charger for a few days. I never keep the charger plugged in continually.
MEXICOWANDERER
Explorer
Apr 07, 2021
Duracell is a re-brand. Perhaps John Controls? A helping hand for warm weather use and storage is to adjust electrolyte density to 1.260

This must be done when the battery is brand new. It should be top charged and rested for a day. This can easily add 30 - 50% added lifespan.

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