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because they run out of energy
It could be that the batteries are getting old and need to be replaced.
batteries need to be replaced
Yes, they and you need to refer to the owner's manual when it has to be replaced.
Most likely, the batteries have died and need to be replaced/recharged.
The batteries will run out and they will no longer work.
Many people are hesitant to buy a hybrid vehicle because they have heard that the batteries need to be replaced long before the car's useful life is over. Typically, car manufacturers build hybrid cars with the belief that the batteries will last about 8 years or 200,000 miles before they might need to be serviced or replaced. Your hybrid vehicle usually will come with an 8 year warranty on the batteries and if they need to be replaced before then, the Dealer or Manufacturer will replace it either for free or for the depreciated value of the battery pack.
You may need to clean car batteries occasionally, but if regular batteries leak you should just get rid of them. anonymous@oola.com
Depending on what kind of camera you have, you may be able to use regular AAA or AA batteries. Certain cameras, however, use Lithium Ion batteries that do need to be replaced or recharged after a certain amount of time.
If the smoke alarm lasts for ten years before you need to replace it, and the batteries should be replaced at least once per year, you would need to change the batteries of a smoke alarm ten times before you replace the entire thing.
Batteries do not last for ever and after about 3 years they need to be replaced. An old battery simply will not hold its charge. Therefore as a first step in chasing down your problem, get your battery tested.
Hearing aid batteries run out sooner than other types of batteries. They will need to be replaced more often if your volume on the hearing aid is high, or other factors. They generally will only last about 7 days.