Yes
a hydrometer checks the state of battery charge using specific gravity.
By using refractometer or Hydrometer
Hydrometer
Not really. Just charge it normally. Freezing it won't do anything but waste your time, which you could've used to actually charge it.
An instrument for measuring the Density of a liquid. The density of the Acid in a car Battery, changes as the stored electrici charge in the battery, is used to power things. A Hydrometer is commonly used to measure the Acid Density in Lead/Acid car batteries. The result of the Hydrometer reading let's you know how much electric charge is left in the battery. It is most commonly used to find out whether or not, the battery is old and depleted, or still in good condition. Go to Wikipedia to find out what a Hydrometer looks like.
I suggest you get a battery hydrometer and check it periodically until it is charged. Overcharging depletes water from the battery. Undercharging shortens the battery life.
Overcharging or defective battery. They will also crake in freezing temperatures if the battery has lost it's charge.
Have the coolant tested to be sure it will protect from freezing to at least -34 degrees F. Add a fuel stabilizer to the fuel tank and fill the tank with fuel. Run the engine to get the stabilizer throughout the system. Once parked remove the battery and store the battery in a safe place to keep from freezing. Perform a trickle charge on the battery once a month.
No. Freezing a battery will damage it. have you tested it? The worst environment for any battery is COLD. That is why there are so many problems with car batteries in the Winter. If the electrolyte in the battery freezes, it will usually expand and crack the battery case or distort the plates in the battery
Most batteries today are sealed so a hydrometer is useless. A fully charged battery will read 12.6 volts with a digital volt meter. At 75% charge it will read 12.4 volts, at 50% it will read 12.2 volts and at 25% charge it will read 12 volts. But if you have another type battery then here is what you need to know. A fully charged golf cart battery or fork lift battery will read 1300 A fully charged auto or truck battery will read 1275 A fully charge cell phone tower or solar storage battery will read 1250
Most batteries today are sealed so a hydrometer is useless. A fully charged battery will read 12.6 volts with a digital volt meter. At 75% charge it will read 12.4 volts, at 50% it will read 12.2 volts and at 25% charge it will read 12 volts. But if you have another type battery then here is what you need to know. A fully charged Golf cart battery or fork lift battery will read 1300 A fully charged auto or truck battery will read 1275 A fully charge cell phone tower or solar storage battery will read 1250
A hygrometer measures relative humidity in the air while a hydrometer measures the density of a liquid. Hygrometers tell you about the weather, while hygrometers are used for things like checking how much charge is in a lead acid battery or checking how your home brew is going.