diff --git a/src/board/system76/bonw15/board.mk b/src/board/system76/bonw15/board.mk
index 84f83980f..3e563e730 100644
--- a/src/board/system76/bonw15/board.mk
+++ b/src/board/system76/bonw15/board.mk
@@ -31,10 +31,11 @@ CFLAGS+=-DPS2_TOUCHPAD=PS2_3
 CFLAGS+=-DI2C_USBPD=I2C_1
 
 # Set smart charger parameters
+# XXX: PRS1 and PRS2 are in parallel for adapter Rsense?
 CHARGER=oz26786
 CFLAGS+=\
 	-DCHARGER_ADAPTER_RSENSE=5 \
-	-DCHARGER_BATTERY_RSENSE=10 \
+	-DCHARGER_BATTERY_RSENSE=5 \
 	-DCHARGER_CHARGE_CURRENT=3072 \
 	-DCHARGER_CHARGE_VOLTAGE=17400 \
 	-DCHARGER_INPUT_CURRENT=16920
diff --git a/src/board/system76/oryp11/board.mk b/src/board/system76/oryp11/board.mk
index 8b77bfb03..a0b028df1 100644
--- a/src/board/system76/oryp11/board.mk
+++ b/src/board/system76/oryp11/board.mk
@@ -36,7 +36,7 @@ CFLAGS+=-DI2C_USBPD=I2C_1
 # TODO: actually bq24800
 CHARGER=bq24780s
 CFLAGS+=\
-	-DCHARGER_ADAPTER_RSENSE=5 \
+	-DCHARGER_ADAPTER_RSENSE=10 \
 	-DCHARGER_BATTERY_RSENSE=10 \
 	-DCHARGER_CHARGE_CURRENT=3072 \
 	-DCHARGER_CHARGE_VOLTAGE=17600 \
diff --git a/src/board/system76/serw13/board.mk b/src/board/system76/serw13/board.mk
index 8d990ef58..cd3c05d6e 100644
--- a/src/board/system76/serw13/board.mk
+++ b/src/board/system76/serw13/board.mk
@@ -32,9 +32,8 @@ CFLAGS+=-DI2C_USBPD=I2C_1
 
 # Set smart charger parameters
 # TODO: actually bq24800
-# XXX: What is PRS3?
 CFLAGS+=\
-	-DCHARGER_ADAPTER_RSENSE=5 \
+	-DCHARGER_ADAPTER_RSENSE=10 \
 	-DCHARGER_BATTERY_RSENSE=10 \
 	-DCHARGER_CHARGE_CURRENT=2048 \
 	-DCHARGER_CHARGE_VOLTAGE=13050 \