need a battery. Which one? and where to buy?

[Hulk]

BTW, should mention to watch units. That chart is given in °C, so when you drop below 50% state of charge the possibility does start to increase quite dramatically. At 25% SoC the point that particular curve indicates freezing could occur at -4°F and it wouldn't take but a day for the mass of a battery to equalize. A dead battery will freeze like it's water, at 32°F. But >75% SoC it would take interior of Alaska (-58°F) to start to worry.

Also, if you suspect you have a frozen battery and it has not split the case bring it inside and let it warm up gently, preferably in a tub or something just in case it does leak. Don't attempt to accelerate and definitely do not put it on a charger or attempt a jump start. Frozen electrolyte doesn't work and pushing high current through it can cause an explosion.

Great info, Dave. Looks like there is a significant benefit to keeping batteries fully charged.

 

[Inukshuk]

For my DD 100 I went to Batteries plus, bought a Duracell Group 27. Gave them a 10% discount code from their website. Done. Oh, and a $10 mail in rebate.

Duracell Ultra Gold BCI Group 27F Car and Truck Battery - SLI27FM at Batteries Plus Bulbs

Duracell Ultra Gold group 27F replacement battery designed for low maintenance and dependable engine starting power. Perfect replacement battery for Ford, Lincoln and more

www.batteriesplus.com