How long does a cordless phone battery last? (2024)

The average battery life of a cordless telephone is about 1 to 2 years. For some cases it may not be able to charge up within a year. This is likely because the battery has been charged before and left to discharge to too low a voltage. You would then not be able to charge up the battery using the normal charging method.
For models which come with a spare battery; make sure that the handset batteries and the spare batteries are fully charged, do not place the handset back to charge but interchange the current batteries with the spare batteries when the battery indicator blinks.
For models that come with only one battery; if your talk time is not too long, you can charge the handset at night and use it through the day. If your talk time is long for each call, then it would be best that you put the phone back to charge after every one or two calls. Otherwise, the handset may be discharged and another 10 hours will be needed to charge up the phone.
When your batteries have been used for more than a year, look out for any chemical corrosion that might appear at the battery plug. If such corrosion occurs, change the battery immediately to avoid the chemical corrosion from damaging the PCB. Once the PCB is damaged, it cannot be repaired.

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