Article reference KA-02005
The TRM & CTR towel rail controls will remember all configured settings when powered off, except the current time & any PIN number set. The current time is only held for around 3 hours in the event of power loss, by the use of a small backup capacitor.
It is not a battery and does not require replacement.
Applicable to models: TRM21W4, TRM14W5, TRM21W5, TRM28W5, TRM21C4, TRM14C5, TRM21C5, TRM28C5, CTR7W, CTR7C, CTR10W, CTR10C, CTR12W, CTR12C