At the very first sign of any problems starting the vehicle.
when cranking the engine the battery voltage should not fall below 9.6volts if so replace battery
im guessing that your talking about the alarm/keyless remote. You will find that you have to get closer and closer to the car to be able to unlock it. You should replace the battery when you have to be within about 10ft from the car.
form_title=Replace The Battery in Your Car form_header=Prevent a situation where the car won't start by routinely replacing the battery. When did you last replace your car battery?=_ What type of installation do you want?= () Self () Professional
if the battery gets weak and useless, then you have to replace it...
No, replace the battery.
As a part of your routine maintenance you should have your battery "Load Tested" at least once a year. When it fails testing replace it. If you run it too long it starts to harm the alternator and starter.
There is a crack in the battery case. Replace the battery.
replace it just like any car battery
until it no longer unlocks the car, or on the dashboard it says Replace Key Battery!
Then replace it.
When buying a car battery it is best to choose one with an extended warranty so that if anything should go wrong with the battery or it isn't charging correctly, the company will replace it at no charge to you. I would buy a new car battery with a warranty instead recharging your old one.
It means the battery has been drained of all it's power. Simply recharge the battery with a battery charger and it will be fine. You do not have to replace the battery, although draining the battery fully does harm the battery. Charge the battery fully and it will function as it should.