I assume you mean if it is stored. It depend on the battery and what condition it is in. A good auto battery will hold it's charge for at least 6 months.
Depends on the condition of the battery. Most will hold a charge for at least 6 months if they are not connected to anything.
Depends on what it is being used in.
A good auto battery will hold it's charge for at least 6 months or longer.
This particular battery is advertised as being very long-lived. If you are having problems getting it to hold a charge, it may be faulty and need to be replaced.
A battery that won't hold a charge has a dead cell and must be replaced. This is assuming there is not something on that is pulling power from the battery.
30 year old battery?? I have never heard of a battery lasting this long. This has to be a record of some sort. I would contact the battery manufacture as they may want this battery and give you a new one for it. Anyway if the battery will not hold a charge it has a dead cell and needs to be replaced.
"HHR P104 phone battery typically holds a charge for about 12 hours. However, it all depends on usage. It can hold charge for two days if not used for a longer period of time."
How long it takes to charge any battery depends on how much electrical charge it can hold. The physical size of a battery can give an indication of how much charge it may hold: the larger the battery, the more electrical charge it is likely to be able to hold. or you could just divide the mAh of the battery by the output rate of the charger. ex: 5000 mAh on a 3000 milliamp output charger would be 1hr 36min. and 3300 mAh on the same charger would be 1hr 10min. and so on.
Battery is getting old and will not hold a charge or there is a drain on it. Battery is getting old and will not hold a charge or there is a drain on it.
Yes, it will hold it's charge for at least 6 months in storage if it is a very good battery to start with.
Batteries charge nothing they hold a charge.
Remove the negative cable over night. If it does not hold a charge, the battery has a dead cell and needs replacing. If it does hold a charge but will not when the negative cable is connected you have something on that is drawing power from the battery. Some light or a relay is stuck.