My Response SA5 Alarm has worked perfectly for 6 years. When the external siren started bleeping every time I opened the front door and my control panel failed after a power cut I knew that I had stretched the recommended 4-5 year battery replacement too far.
I ordered 3 6V Rechargeable batteries by Response; 2 for the control panel and 1 for the external siren. They were a bit more expensive than some alternatives I saw, but much cheaper than the main dealers website. I was impressed that they arrived the next day. I was apprehensive when I unpacked them as they were very different in colour to what was displayed on Amazon. On closer inspection, I found that it was the same make but a different colour, phew!
They were easy enough to fit, although the clips that fit on to the terminals can be really tight so be careful with the thin wires.
Everything is back in place, fully charged and we are back up to full security, so I am very satisfied.
Thank you to everyone who left feedback on here as it really helped me with my decision.