Drastic change in battery capacity in a single day?

I have used my MBPr (MacBookPro11,1) since 15 months without a glitch, was getting decent battery life,

updated my OSX to 10.11.2 BETA 4 along with the newer recovery update TWO DAYS ago and since then my mac started to shut down abruptly and randomly at 30% charge, 20% charge. Pressing power key does not help, plugging in boots the system up.

Now my system report shows:

Designed Capacity : 6630

Current Capacity: 2373

Charge Remaining (mAh): 1194

Fully Charged: No

Charging: No

Full Charge Capacity (mAh): 2373

Health Information:

Cycle Count: 424

Condition: Normal

Battery Installed: Yes

Amperage (mA): -549

Voltage (mV): 1174

As you can see i have only got 424 cycles on my battery, i do not understand the sudden problem it has got.

Battery life previously: 7hrs on average

Battery life now : 3 hrs

I have tried jumping back to OSX 10.11.1, but no gain, i will be trying to wipe the drive and reinstall OSX 10.11.1 along with the recovery.

Any help and suggestions in this direction will be highly appreciated.

Charge Inform