Surface Pro 2 Battery Report after 3 Months

I purchased my Surface Pro 2 in the middle of November 2013. Since then, I've used it as my daily driver, replacing my desktop. In addition, I had the December firmware bug, which prevented the device from sleeping correctly, and caused it to overheat and drain to 0% a couple of times. I tried to get it swapped out because of this, but the MS store rep refused, saying the device was fine. I'll keep tabs on this and see if he was right or not.

After 3 months, my battery report looks like this. You can grab this by running powercfg /batteryreport from a command prompt. PowerShell doesn't seem to work, for whatever reason.

The system reports I've used 70 cycles, and my full charge capacity is 2,000 mWh lower than the design capacity. I've heard LiOn batteries wear the most in the beginning, but a month ago at the MS store, the full charge capacity was listed as higher than the design, something the rep pointed out to me as a sign that the device was fine. I'll take it as a sign that the firmware was junked.

I honestly do not know enough about batteries to know if this is good or bad, but the battery life does not feel like it's decreased significantly, so I'll take it as it is for now, and keep tabs on it every month.

Full battery report below.

Battery report

COMPUTER NAME KOMALI
SYSTEM PRODUCT NAME Microsoft Corporation Surface Pro 2
BIOS 2.04.0350 12/18/2013
OS BUILD 9600.16452.amd64fre.winblue_gdr.131030-1505
PLATFORM ROLE Slate
CONNECTED STANDBY Not supported
REPORT TIME 2014-02-09 10:46:15

Installed batteries

Information about each currently installed battery
BATTERY 1
NAMEX863568
MANUFACTURERLGC_LGC
SERIAL NUMBER1F11
CHEMISTRYLION
DESIGN CAPACITY42,002 mWh
FULL CHARGE CAPACITY40,027 mWh
CYCLE COUNT70

Recent usage

Power states over the last 3 days
START TIME STATE SOURCE CAPACITY REMAINING
2014-02-06 11:25:55 Active Battery 71 % 28,727 mWh
13:19:53 Suspended 44 % 17,538 mWh
13:20:32 Active Battery 44 % 17,471 mWh
13:51:52 Suspended 39 % 15,488 mWh
15:14:34 Active Battery 38 % 15,414 mWh
15:17:33 Suspended 38 % 15,207 mWh
15:22:00 Active Battery 37 % 15,089 mWh
15:31:12 Suspended 35 % 14,127 mWh
15:32:42 Active Battery 35 % 14,045 mWh
15:33:58 Suspended 34 % 13,897 mWh
18:24:32 Active AC 60 % 23,939 mWh
19:10:03 Active Battery 92 % 36,726 mWh
19:59:00 Suspended 76 % 30,658 mWh
20:13:55 Active Battery 72 % 28,882 mWh
20:30:44 Suspended 69 % 27,602 mWh
20:33:21 Active Battery 68 % 27,476 mWh
21:26:35 Active AC 52 % 20,742 mWh
22:20:36 Active Battery 91 % 36,519 mWh
23:13:07 Suspended 75 % 30,066 mWh
2014-02-07 06:44:15 Active Battery 76 % 30,532 mWh
07:28:50 Active AC 59 % 23,880 mWh
08:06:14 Active Battery 88 % 35,476 mWh
08:07:05 Suspended 87 % 35,224 mWh
08:48:00 Active Battery 88 % 35,076 mWh
09:14:02 Suspended 82 % 32,871 mWh
12:39:34 Active Battery 82 % 32,693 mWh
14:04:27 Suspended 60 % 23,924 mWh
14:05:06 Active Battery 60 % 23,865 mWh
15:19:34 Suspended 45 % 18,123 mWh
19:00:47 Active AC 46 % 18,663 mWh
19:58:53 Active Battery 91 % 36,637 mWh
20:42:29 Suspended 74 % 30,044 mWh
20:58:34 Active Battery 74 % 29,815 mWh
21:02:38 Suspended 72 % 29,208 mWh
2014-02-08 08:09:00 Active Battery 72 % 29,015 mWh
09:53:20 Active AC 36 % 14,519 mWh
10:57:39 Suspended 87 % 35,009 mWh
13:10:58 Active Battery 87 % 34,869 mWh
13:24:51 Suspended 82 % 32,664 mWh
14:07:19 Active Battery 81 % 32,390 mWh
15:37:05 Active AC 46 % 18,330 mWh
16:47:42 Suspended 95 % 38,147 mWh
21:04:44 Active Battery 94 % 37,673 mWh
22:56:47 Active AC 50 % 20,217 mWh
23:39:35 Suspended 85 % 33,944 mWh
2014-02-09 09:40:51 Active Battery 85 % 33,862 mWh
10:46:00 Report generated Battery 58 % 23,414 mWh

Battery usage

Battery drains over the last 3 days
START TIME STATE DURATION ENERGY DRAINED
2014-02-06 11:25:55 Active 1:53:5828 % 11,189 mWh
13:20:32 Active 0:31:195 % 1,983 mWh
15:14:34 Active 0:02:591 % 207 mWh
15:22:00 Active 0:09:112 % 962 mWh
15:32:42 Active 0:01:15-148 mWh
19:10:03 Active 0:48:5615 % 6,068 mWh
20:13:55 Active 0:16:483 % 1,280 mWh
20:33:21 Active 0:53:1417 % 6,734 mWh
22:20:36 Active 0:52:3016 % 6,453 mWh
2014-02-07 06:44:15 Active 0:44:3416 % 6,652 mWh
08:06:14 Active 0:00:511 % 252 mWh
08:48:00 Active 0:26:016 % 2,205 mWh
12:39:34 Active 1:24:5322 % 8,769 mWh
14:05:06 Active 1:14:2714 % 5,742 mWh
19:58:53 Active 0:43:3516 % 6,593 mWh
20:58:34 Active 0:04:042 % 607 mWh
2014-02-08 08:09:00 Active 1:44:1936 % 14,496 mWh
13:10:58 Active 0:13:526 % 2,205 mWh
14:07:19 Active 1:29:4535 % 14,060 mWh
21:04:44 Active 1:52:0344 % 17,456 mWh
2014-02-09 09:40:51 Active 1:05:0826 % 10,448 mWh

Usage history

History of system usage on AC and battery
BATTERY DURATION AC DURATION
PERIOD ACTIVE CONNECTED STANDBY ACTIVE CONNECTED STANDBY
2013-11-17 - 2013-11-2422:34:44- 7:01:06-
2013-11-24 - 2013-12-0142:58:38- 10:41:46-
2013-12-01 - 2013-12-0820:47:09- 7:03:28-
2013-12-08 - 2013-12-159:32:03- 0:43:14-
2013-12-15 - 2013-12-2210:09:05- --
2013-12-22 - 2013-12-2924:07:09- 2:26:24-
2013-12-29 - 2014-01-0518:59:00- 6:21:04-
2014-01-05 - 2014-01-1228:58:00- 9:35:39-
2014-01-12 - 2014-01-1936:51:46- 7:54:16-
2014-01-19 - 2014-01-2635:21:11- 12:49:28-
2014-01-274:58:24- 1:33:03-
2014-01-284:40:56- 1:39:59-
2014-01-296:12:05- 2:05:17-
2014-01-304:28:07- 1:52:29-
2014-01-316:26:54- 1:13:04-
2014-02-013:51:16- 1:24:06-
2014-02-024:00:29- 3:10:34-
2014-02-035:02:12- 2:18:47-
2014-02-042:12:32- 1:39:38-
2014-02-055:57:25- 1:59:50-
2014-02-065:31:14- 1:39:29-
2014-02-074:29:46- 1:35:28-
2014-02-085:06:22- 1:33:09-

Battery capacity history

Charge capacity history of the system's batteries
PERIOD FULL CHARGE CAPACITY DESIGN CAPACITY
2013-11-17 - 2013-11-2441,907 mWh 42,002 mWh
2013-11-24 - 2013-12-0141,746 mWh 42,002 mWh
2013-12-01 - 2013-12-0841,411 mWh 42,002 mWh
2013-12-08 - 2013-12-1541,351 mWh 42,002 mWh
2013-12-15 - 2013-12-2241,303 mWh 42,002 mWh
2013-12-22 - 2013-12-2941,067 mWh 42,002 mWh
2013-12-29 - 2014-01-0541,508 mWh 42,002 mWh
2014-01-05 - 2014-01-1241,362 mWh 42,002 mWh
2014-01-12 - 2014-01-1941,179 mWh 42,002 mWh
2014-01-19 - 2014-01-2641,219 mWh 42,002 mWh
2014-01-2741,112 mWh 42,002 mWh
2014-01-2840,781 mWh 42,002 mWh
2014-01-2940,526 mWh 42,002 mWh
2014-01-3040,244 mWh 42,002 mWh
2014-01-3140,230 mWh 42,002 mWh
2014-02-0139,985 mWh 42,002 mWh
2014-02-0240,113 mWh 42,002 mWh
2014-02-0340,316 mWh 42,002 mWh
2014-02-0439,987 mWh 42,002 mWh
2014-02-0540,330 mWh 42,002 mWh
2014-02-0640,268 mWh 42,002 mWh
2014-02-0740,179 mWh 42,002 mWh
2014-02-0840,216 mWh 42,002 mWh

Battery life estimates

Battery life estimates based on observed drains
AT FULL CHARGE AT DESIGN CAPACITY
PERIOD ACTIVECONNECTED STANDBY ACTIVECONNECTED STANDBY
2013-11-17 - 2013-11-246:23:35- 6:24:27-
2013-11-24 - 2013-12-016:19:22- 6:21:42-
2013-12-01 - 2013-12-085:44:14- 5:49:08-
2013-12-08 - 2013-12-156:37:23- 6:43:38-
2013-12-15 - 2013-12-227:09:25- 7:16:41-
2013-12-22 - 2013-12-296:29:22- 6:38:14-
2013-12-29 - 2014-01-055:20:04- 5:23:52-
2014-01-05 - 2014-01-126:02:35- 6:08:11-
2014-01-12 - 2014-01-196:06:15- 6:13:35-
2014-01-19 - 2014-01-265:11:54- 5:17:49-
2014-01-275:19:28- 5:26:23-
2014-01-285:00:17- 5:09:16-
2014-01-295:59:31- 6:12:36-
2014-01-305:15:03- 5:28:49-
2014-01-315:24:07- 5:38:23-
2014-02-014:39:49- 4:53:56-
2014-02-024:40:59- 4:54:13-
2014-02-034:42:39- 4:54:28-
2014-02-044:32:11- 4:45:54-
2014-02-056:32:43- 6:49:00-
2014-02-065:54:27- 6:09:43-
2014-02-075:55:10- 6:11:17-
2014-02-084:21:52- 4:33:30-
Current estimate of battery life based on all observed drains since OS install
Since OS install 5:40:25- 5:57:13-