I recently turned off the mains in my house, and immediately the burglar alarm outside started making a weak "strangled duck" type noise. I restored the power and the alarm went off in tamper mode.
I have cut the power many times in the 2 years I have been in this house, and the alarm has never done this before, so I would suspect a dead backup battery inside.
I've opened it up and it's a DETA 12V rechargable sealed lead-acid battery.
A couple of questions...
1) should the battery recharge itself when the mains is connected? If so, the fact that 2 weeks later the tamper is still happening as soon as power is cut means this recharge musn't be happening.
2) If it doesn't recharge, how do I go about recharging it, will a car battery charger do the trick?
Any help appreciated.
I have cut the power many times in the 2 years I have been in this house, and the alarm has never done this before, so I would suspect a dead backup battery inside.
I've opened it up and it's a DETA 12V rechargable sealed lead-acid battery.
A couple of questions...
1) should the battery recharge itself when the mains is connected? If so, the fact that 2 weeks later the tamper is still happening as soon as power is cut means this recharge musn't be happening.
2) If it doesn't recharge, how do I go about recharging it, will a car battery charger do the trick?
Any help appreciated.