diff --git a/board/slippy/board.c b/board/slippy/board.c
index 3f2b6a9c0e..69566ef404 100644
--- a/board/slippy/board.c
+++ b/board/slippy/board.c
@@ -70,6 +70,7 @@ const struct gpio_info gpio_list[GPIO_COUNT] = {
 	{"BOARD_VERSION2",       LM4_GPIO_Q, (1<<6), GPIO_INPUT, NULL},
 	{"BOARD_VERSION3",       LM4_GPIO_Q, (1<<7), GPIO_INPUT, NULL},
 	{"CPU_PGOOD",            LM4_GPIO_C, (1<<4), GPIO_INPUT, NULL},
+	{"BAT_DETECT_L",         LM4_GPIO_B, (1<<4), GPIO_INPUT, NULL},
 
 	/* Outputs; all unasserted by default except for reset signals */
 	{"CPU_PROCHOT",          LM4_GPIO_B, (1<<1), GPIO_OUT_LOW, NULL},
diff --git a/board/slippy/board.h b/board/slippy/board.h
index fe4470687a..18cc4628f2 100644
--- a/board/slippy/board.h
+++ b/board/slippy/board.h
@@ -17,6 +17,7 @@
 /* Optional features */
 #define CONFIG_SMART_BATTERY
 #define CONFIG_BACKLIGHT_X86
+#define CONFIG_BATTERY_CHECK_CONNECTED
 #define CONFIG_BATTERY_SLIPPY
 #define CONFIG_BOARD_VERSION
 #define CONFIG_CHARGER
@@ -97,6 +98,7 @@ enum gpio_signal {
 	GPIO_BOARD_VERSION2,       /* Board version stuffing resistor 2 */
 	GPIO_BOARD_VERSION3,       /* Board version stuffing resistor 3 */
 	GPIO_CPU_PGOOD,            /* Power good to the CPU */
+	GPIO_BAT_DETECT_L,         /* Battery detect. Repurposed BAT_TEMP */
 
 	/* Outputs */
 	GPIO_CPU_PROCHOT,          /* Force CPU to think it's overheated */
diff --git a/common/battery_slippy.c b/common/battery_slippy.c
index 14c7b3dee4..8d9648d26d 100644
--- a/common/battery_slippy.c
+++ b/common/battery_slippy.c
@@ -6,6 +6,7 @@
  */
 
 #include "battery_pack.h"
+#include "gpio.h"
 
 /* FIXME: We need REAL values for all this stuff */
 static const struct battery_info info = {
@@ -50,3 +51,11 @@ void battery_vendor_params(struct batt_params *batt)
 	}
 #endif
 }
+
+/**
+ * Physical detection of battery connection.
+ */
+int battery_is_connected(void)
+{
+	return (gpio_get_level(GPIO_BAT_DETECT_L) == 0);
+}