emergency key

Many including me overlook this normally unused feature, but ATM, when many cars are seeing far less use than normal, it's important to check that the emergency key will open the drivers door and, if applicable, the boot. I got caught out myself about 3 weeks ago when the battery was so flat...

Hi, Just returned today from 6 weeks away, and went to start car, but battery is completely flat. Key, and spare, both indicate that they are sending signals, but doors do not unlock. When I look through the window at the dashboard, I see that the clock has stopped. Tried the emergency (blade)...