diff -ur ./arch/arm.ofic/mach-pxa/corgi_pm.c ./arch/arm/mach-pxa/corgi_pm.c
--- ./arch/arm.ofic/mach-pxa/corgi_pm.c	2009-11-23 20:48:26.000000000 +0100
+++ ./arch/arm/mach-pxa/corgi_pm.c	2009-11-23 06:45:45.000000000 +0100
@@ -215,7 +215,6 @@
 	.fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
 	.bat_levels       = 40,
 	.bat_levels_noac  = sharpsl_battery_levels_noac,
-	.bat_levels_acin  = sharpsl_battery_levels_acin,
 	.status_high_acin = 188,
 	.status_low_acin  = 178,
 	.status_high_noac = 185,
diff -ur ./arch/arm.ofic/mach-pxa/sharpsl_pm.c ./arch/arm/mach-pxa/sharpsl_pm.c
--- ./arch/arm.ofic/mach-pxa/sharpsl_pm.c	2009-11-23 20:48:26.000000000 +0100
+++ ./arch/arm/mach-pxa/sharpsl_pm.c	2009-11-29 09:56:57.000000000 +0100
@@ -78,90 +78,25 @@
 
 
 
-struct battery_thresh sharpsl_battery_levels_acin[] = {
-	{ 213, 100},
-	{ 212,  98},
-	{ 211,  95},
-	{ 210,  93},
-	{ 209,  90},
-	{ 208,  88},
-	{ 207,  85},
-	{ 206,  83},
-	{ 205,  80},
-	{ 204,  78},
-	{ 203,  75},
-	{ 202,  73},
-	{ 201,  70},
-	{ 200,  68},
-	{ 199,  65},
-	{ 198,  63},
-	{ 197,  60},
-	{ 196,  58},
-	{ 195,  55},
-	{ 194,  53},
-	{ 193,  50},
-	{ 192,  48},
-	{ 192,  45},
-	{ 191,  43},
-	{ 191,  40},
-	{ 190,  38},
-	{ 190,  35},
-	{ 189,  33},
-	{ 188,  30},
-	{ 187,  28},
-	{ 186,  25},
-	{ 185,  23},
-	{ 184,  20},
-	{ 183,  18},
-	{ 182,  15},
-	{ 181,  13},
-	{ 180,  10},
-	{ 179,   8},
-	{ 178,   5},
-	{   0,   0},
-};
-
 struct battery_thresh sharpsl_battery_levels_noac[] = {
-	{ 213, 100},
-	{ 212,  98},
-	{ 211,  95},
-	{ 210,  93},
-	{ 209,  90},
-	{ 208,  88},
-	{ 207,  85},
-	{ 206,  83},
-	{ 205,  80},
-	{ 204,  78},
-	{ 203,  75},
-	{ 202,  73},
-	{ 201,  70},
-	{ 200,  68},
-	{ 199,  65},
-	{ 198,  63},
-	{ 197,  60},
-	{ 196,  58},
-	{ 195,  55},
-	{ 194,  53},
-	{ 193,  50},
-	{ 192,  48},
-	{ 191,  45},
-	{ 190,  43},
-	{ 189,  40},
-	{ 188,  38},
-	{ 187,  35},
-	{ 186,  33},
-	{ 185,  30},
-	{ 184,  28},
-	{ 183,  25},
-	{ 182,  23},
-	{ 181,  20},
-	{ 180,  18},
-	{ 179,  15},
-	{ 178,  13},
-	{ 177,  10},
-	{ 176,   8},
-	{ 175,   5},
-	{   0,   0},
+	{ 3980, 100 },
+	{ 3900, 95 },
+	{ 3860, 90 },
+	{ 3800, 85 },
+	{ 3760, 80 },
+	{ 3720, 74 },
+	{ 3680, 69 },
+	{ 3620, 65 },
+	{ 3570, 59 },
+	{ 3560, 55 },
+	{ 3550, 48 },
+	{ 3530, 45 },
+	{ 3510, 39 },
+	{ 3490, 33 },
+	{ 3470, 29 },
+	{ 3450, 23 },
+	{ 3410, 16 },
+	{    0, 0 },
 };
 
 /* MAX1111 Commands */
@@ -194,16 +129,64 @@
 #endif
 }
 
-static int get_percentage(int voltage)
+
+typedef int milliamp_t;
+typedef int milliohm_t;
+typedef int millivolt_t;
+
+milliamp_t basic_current = 125;
+milliohm_t battery_resistance = 100;
+
+/* 422 seems to be suitable for very old, 1Ah battery.
+   2Ah battery probably has better resistance */
+
+/* Unfortunately, resistance depends on state of charge, current
+ * direction and temperature.
+ *
+ * Ouch, and dependency is actually _not_ too simple. It is lowest
+ * at 3.55V, very slowly rises at 4V (approximately linear dependency),
+ * and quickly rises towards 3.2V (in something exponential-looking).
+ *
+ * It is about same at 25Celsius and 40Celsius, and about 2.5x the value
+ * on 0Celsius, rising _very_ sharply.
+ *
+ * Li-ion should only be charged between 0 and 45 Celsius, and discharged
+ * between -20 and 60 celsius.
+ */
+
+extern int backlight_current;
+
+/* Positive values: current drawn from battery */
+milliamp_t battery_current(void)
+{
+	if (sharpsl_pm.charge_mode == CHRG_ON)
+		return 0;
+
+	return basic_current;
+}
+
+millivolt_t liion_internal_voltage(millivolt_t voltage, milliamp_t current_ma)
+{
+	return voltage + (battery_resistance * current_ma / 1000);
+}
+
+/* returns mV */
+millivolt_t liion_voltage(int adc)
+{
+	/* Thanks to Stanislav B. ADC has 3.3V as reference,
+	   is connected to battery over 47kOhm,
+	   and to ground over 100kOhm. */
+	return (adc * 147 * 33)/256;
+}
+
+static int get_percentage(int voltage_adc)
 {
 	int i = sharpsl_pm.machinfo->bat_levels - 1;
 	int bl_status = sharpsl_pm.machinfo->backlight_get_status ? sharpsl_pm.machinfo->backlight_get_status() : 0;
 	struct battery_thresh *thresh;
+	millivolt_t voltage = liion_voltage(voltage_adc);
 
-	if (sharpsl_pm.charge_mode == CHRG_ON)
-		thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_acin_bl : sharpsl_pm.machinfo->bat_levels_acin;
-	else
-		thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_noac_bl : sharpsl_pm.machinfo->bat_levels_noac;
+	thresh = sharpsl_pm.machinfo->bat_levels_noac;
 
 	while (i > 0 && (voltage > thresh[i].voltage))
 		i--;
diff -ur ./arch/arm.ofic/mach-pxa/spitz_pm.c ./arch/arm/mach-pxa/spitz_pm.c
--- ./arch/arm.ofic/mach-pxa/spitz_pm.c	2009-11-23 20:48:26.000000000 +0100
+++ ./arch/arm/mach-pxa/spitz_pm.c	2009-11-23 06:45:25.000000000 +0100
@@ -209,7 +209,6 @@
 	.fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
 	.bat_levels       = 40,
 	.bat_levels_noac  = sharpsl_battery_levels_noac,
-	.bat_levels_acin  = sharpsl_battery_levels_acin,
 	.status_high_acin = 188,
 	.status_low_acin  = 178,
 	.status_high_noac = 185,