diff --git a/kmk/extensions/ble_split.py b/kmk/extensions/ble_split.py
index ffbba89..94a6408 100644
--- a/kmk/extensions/ble_split.py
+++ b/kmk/extensions/ble_split.py
@@ -39,13 +39,8 @@ class BLE_Split(Extension):
 
         if self.split_flip and not self._is_target:
             keyboard.col_pins = list(reversed(keyboard.col_pins))
-        if self.split_side == 'Left':
-            self._is_target = True
-            self.target_advertise()
-        elif self.split_side == 'Right':
-            self._is_target = False
-            self.initiator_scan()
 
+        self.connect()
         # Attempt to sanely guess a coord_mapping if one is not provided.
         if not keyboard.coord_mapping:
             keyboard.coord_mapping = []
@@ -77,6 +72,15 @@ class BLE_Split(Extension):
         elif not self._is_target and self._connection_count < 1:
             self.initiator_scan()
 
+    def connect(self):
+        if not self.check_all_connections() and self.ble_rescan_timer:
+            if self.split_side == 'Left':
+                self._is_target = True
+                self.target_advertise()
+            elif self.split_side == 'Right':
+                self._is_target = False
+                self.initiator_scan()
+
     def initiator_scan(self):
         self._uart = None
         # See if any existing connections are providing UARTService.
@@ -88,9 +92,9 @@ class BLE_Split(Extension):
                     break
 
         if not self._uart:
-            print('Scanning...')
+            print('Scanning')
             for adv in self._ble.start_scan(ProvideServicesAdvertisement, timeout=20):
-                print('Scanning...')
+                print('Scanning')
                 if UARTService in adv.services:
                     self._uart = self._ble.connect(adv)
                     self._ble.stop_scan()
@@ -156,3 +160,10 @@ class BLE_Split(Extension):
                 return update
 
         return None
+
+    def ble_rescan_timer(self):
+        return bool(ticks_diff(ticks_ms(), self.ble_last_scan) > 5000)
+
+    def ble_time_reset(self):
+        self.ble_last_scan = ticks_ms()
+        return self
diff --git a/kmk/extensions/power.py b/kmk/extensions/power.py
new file mode 100644
index 0000000..f08e583
--- /dev/null
+++ b/kmk/extensions/power.py
@@ -0,0 +1,102 @@
+from kmk.extensions import Extension
+from kmk.kmktime import sleep_ms, ticks_diff, ticks_ms
+
+
+class Power(Extension):
+    def __init__(self, powersave_pin=None, enable=False, is_target=True):
+        self.enable = enable
+        self.powersave_pin = powersave_pin
+        self.is_target = is_target
+        self._powersave_start = ticks_ms()
+        self._usb_last_scan = ticks_ms() - 5000
+        self._psp = None
+
+    def __repr__(self):
+        return f'Power({self._to_dict()})'
+
+    def _to_dict(self):
+        return (
+            'Power( '
+            f'enable={self.enable} '
+            f'powersave_pin={self.powersave_pin} '
+            f'is_target={self.is_target} '
+            f'_powersave_start={self._powersave_start} '
+            f'_usb_last_scan={self._usb_last_scan} '
+            f'_psp={self._psp} '
+            ')'
+        )
+
+    def during_bootup(self, keyboard):
+        self.enable = not bool(self.usb_scan)
+
+    def before_matrix_scan(self, keyboard_state):
+        if self.usb_rescan_timer():
+            self.enable = not bool(self.usb_scan)
+
+    def after_matrix_scan(self, keyboard_state, matrix_update):
+        if matrix_update:
+            self.psave_time_reset()
+        else:
+            self.psleep()
+
+    def enable_powersave(self):
+        print('Psave True')
+        if self.powersave_pin:
+            import digitalio
+
+            # Allows power save to prevent RGB drain.
+            # Example here https://docs.nicekeyboards.com/#/nice!nano/pinout_schematic
+            if not self._psp:
+                self._psp = digitalio.DigitalInOut(self.powersave_pin)
+            self._psp.direction = digitalio.Direction.OUTPUT
+            self._psp.value = True
+            # TODO Allow a hook to stop RGB/OLED to deinit or this causes a lockup
+
+        self.enable = True
+
+        return self
+
+    def disable_powersave(self):
+        print('Psave False')
+        if self.powersave_pin:
+            import digitalio
+
+            # Allows power save to prevent RGB drain.
+            # Example here https://docs.nicekeyboards.com/#/nice!nano/pinout_schematic
+            if not self._psp:
+                self._psp = digitalio.DigitalInOut(self.powersave_pin)
+            self._psp.direction = digitalio.Direction.OUTPUT
+            self._psp.value = False
+            # TODO Allow a hook to stop RGB/OLED to reinit
+
+        self.enable = False
+
+        return self
+
+    def psleep(self):
+        '''
+        Sleeps longer and longer to save power the more time in between updates.
+        '''
+        if ticks_diff(ticks_ms(), self.powersave_start) <= 20000 and self.is_target:
+            sleep_ms(1)
+        elif ticks_diff(ticks_ms(), self.powersave_start) <= 40000 and self.is_target:
+            sleep_ms(4)
+        elif ticks_diff(ticks_ms(), self.powersave_start) <= 60000 and self.is_target:
+            sleep_ms(8)
+        elif ticks_diff(ticks_ms(), self.powersave_start) >= 240000:
+            sleep_ms(250)
+
+    def psave_time_reset(self):
+        self.powersave_start = ticks_ms()
+        return self
+
+    def usb_rescan_timer(self):
+        return bool(ticks_diff(ticks_ms(), self.usb_last_scan) > 5000)
+
+    def usb_time_reset(self):
+        self.usb_last_scan = ticks_ms()
+        return self
+
+    def usb_scan(self):
+        # TODO Add USB detection here. Currently lies that it's connected
+        return True