Product details
Cordless phone with answer machine
Uses multi-award winning trueCall call blocking technology
One-touch call-blocking button*
Blocks up to 1000 numbers
Do Not Disturb mode
Up to 60 minutes answer machine recording time
Save up to 200 contacts
Up to 21 hours talk and 240 hours standby time
Greater call control with options to block calls by specific numbers or certain call types*
Available in single, twin, trio and quad packs
* You need to have a Caller Display service from your network provider to block nuisance calls and for text messaging features. Charges may apply.
https://www.bt.com/help/user-guides/phones/landline-phones/cordless-phones-with-answer-machine/bt860...
If the batteries are not charging properly then you can buy 2 replacement AA cells from the supermarket for around £10
