Cordless Battery Chargers Paselode Battery Charger If I Replace My Cordless Phone Battery Will I Lose All My Saved Information?

If I replace my cordless phone battery will I lose all my saved information? - cordless battery chargers paselode battery charger

The battery no longer holds a charge for about 20 minutes, even after it on the charger for 12 hours. I have another wireless is not in use and the battery in the same voltage and the AGP when I use the phone, so I thought the exchange of batteries.
But if I have saved all my phone numbers off? Thank you:)