Bluetooth drains battery life like crazy

Hi y'all,
I have a custom PCB designed for the MDBT42Q module(it's a wristwatch). The whole thing's powered by a 12mm CR1225 coin cell. I've been doing some battery life tests and today was the fifth day on the same battery.

I decided to implement the Bluetooth HID function so that my watch can allow me to control music hands-free. However, after uploading the code and testing things out, the battery died about 10 minutes later. I thought it was because my battery just happened to be low when I added the new function. So I put in a new battery, and it was drained in less than an hour.

Can someone please tell me what I'm doing wrong? I believe there's a reason it's called Bluetooth Low Energy...

EDIT: So I found out the battery's still alive and my smart devices can still connect to my watch. The hands-free control still works. However, none of the LEDs on my watch can light up.

Here's the code I used for the hands-free music control function:

var controls = require("ble_hid_controls");
NRF.setServices(undefined, { hid : controls.report });

setWatch(function(e) {
  var len = e.time - e.lastTime;
  if (len > 0.3) {
    controls.next();
  } else {
    controls.playpause();
  }
}, BTN, { edge:"falling",repeat:true,debounce:50});

Sorry if things sounded a bit confusing, I'm Korean so English is not my first language.