This replicates the first of the two patches that the original mec-tools author
needed to do to get his aftermarket battery to validate.

There is a second battery validation function, but he does not spell out the
code around that function - and as I have genuine batteries at the moment, I
didnt want to go looking for it.

See http://www.zmatt.net/unlocking-my-lenovo-laptop-part-3/

@@ battery_validate @@
 0001c850  43 1c 59 63 58 63 32 89  10 88 00 23 90 00 08 b9  |C.YcXc2....#....|
 0001c860  00 21 04 00 58 63 13 88  59 63 31 89 2f 24 08 01  |.!..Xc..Yc1./$..|
 0001c870  08 b8 38 60 10 78 88 71  de 08 2f f3 f8 16 02 11  |..8`.x.q../.....|
-0001c880  0b 08 51 00 00 86 83 b8  24 f0 10 10 80 20 11 10  |..Q.....$.... ..|
+0001c880  4a 26 00 70 00 86 83 b8  24 f0 10 10 80 20 11 10  |J&.p....$.... ..|
 0001c890  81 20 08 b8 38 60 12 10  81 20 10 78 13 10 82 20  |. ..8`... .x... |
 0001c8a0  08 b9 59 61 30 79 ea 08  2f f3 f8 16 02 11 0f 08  |..Ya0y../.......|
 0001c8b0  51 00 00 86 45 20 00 0a  0e f0 05 8e 01 e0 0f 78  |Q...E .........x|