HID keyboard. Connection termination for power budgeting

[Valer_I]

Hello, I'm trying to optimize power on HID Keyboard app. This post was helpfull but yet some questions remains.
If I use several services, and want central to be abble to connect the peripheral in usage one of them is required. In real as soon as peripheral start advertising, the central's HID driver connects device in a very fast intervals (HID over GATT Profile Specification "5.2.6 Fast Connection Interval ...7.5 ms - 50 ms") that is not power efficient.

I'd like to know whether is possible to advertise but not be connected by HID driver on central until keyboard event appear?

[Valer_I]

Hi, to disconnrect and to reconnect after direct advertising is common practice in bluetooth keyboards. Being connected hid keyboard device drains cr2032 battery in 2 days. So disconnection is mandatory. My question was about advertisements mostly.