Arlo Doorbell AC power question

[Billychanarlo]

This is a replacement doorbell from my existing doorbell and chimes which used long ago.

I just installed my Arlo doorbell with Arlo Chime and base station, which they work perfect when Arlo doorbell is in battery mode. 

However when I connect with the existing transformer 18V 500mA (9W), it doesn't lights up. The installation guide shows that it can be operated at voltage between 8 and 24V. So I'm not sure where goes wrong. (The transformer is tested and is working)

[Streak2]

Make sure that you leave the batteries in place, it needs them to operate even when connected to the existing power.

[Billychanarlo]

Hi Master, do you mean I need to put rechargable battery into the doorbell? It doesn't make sense if I put the standard alkaline battery to keep it running (so it drains the power from battery instead of AC power). 

If put a rechargable battery, just normal 1800-2100 mAH should be fine right? 

[Streak2 · Accepted solution]

See the quick start guide here

https://www.arlo.com/en-us/images/Documents/ArloAudioDoorbell/arlo-doorbell-installguide.pdf

where it tells you that the doorbell runs on battery power. You can use rechargeable batteries but you will need to remove them to recharge them.