T420s battery being discharges even when laptop is closed

So my T420s, even when I close the lid the battery still discharges. I talked to Lenovo help and they said it was the battery but I bought a new one and the problem is still exactly the same. Please help me! Any ideas what to do?

The computer is still on when the lid is closed. If you want it to turn off and not not use power you'll need to shutdown or hibernate with the fingerprint reader (if so equipped) turned off. You could also set it up to sleep, which will still use some power, but not that much.
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My TPs: Twist 2HU: i5-3317U Win 8 Pro, 4GB RAM 250GB Samsung 840 | T420 4177CTO: i5-2520M, HD+, Win 7 Pro x64, 8GB RAM, Optimus, 160GB Intel 320 SSD, Intel 6300 WiFi, BT 3.0 | T400 2764CTO: P8700, WXGA, Win 7 Ult x64, AMD 3470, 8GB RAM, 64GB Samsung SSD, BT, Intel 5300 WiFi | A20m 14.1" PIII 500 (retired). Monitors: 2x Dell U2211h IPS 100% sRGB calibrated w/ Spyder3.

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T420s battery being discharges even when laptop is closed

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