diff --git a/keyboards/bat43/config.h b/keyboards/bat43/config.h
index 2a76ab330..645509e43 100644
--- a/keyboards/bat43/config.h
+++ b/keyboards/bat43/config.h
@@ -20,8 +20,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "config_common.h"
 
 /* USB Device descriptor parameter */
-#define VENDOR_ID 0xFEED
-#define PRODUCT_ID 0x1070
+#define VENDOR_ID 0x5946 // YF
+#define PRODUCT_ID 0x0002
 #define DEVICE_VER 0x0001
 #define MANUFACTURER yfuku
 #define PRODUCT bat43
diff --git a/keyboards/bat43/keymaps/via/keymap.c b/keyboards/bat43/keymaps/via/keymap.c
new file mode 100644
index 000000000..0bd07b601
--- /dev/null
+++ b/keyboards/bat43/keymaps/via/keymap.c
@@ -0,0 +1,58 @@
+/* Copyright 2020 yfuku
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include QMK_KEYBOARD_H
+
+// Defines names for use in layer keycodes and the keymap
+enum layer_names {
+    _BASE,
+    _LOWER,
+    _RAISE,
+    _ADJUST
+};
+
+#define L_SPC LT(_LOWER, KC_SPC)
+#define R_ENT LT(_RAISE, KC_ENT)
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    [_BASE] = LAYOUT(
+        KC_ESC,  KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,             KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,    KC_MINS,
+        KC_TAB,  KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_BSPC, KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_RSFT,
+        KC_LCTL, KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,             KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH, KC_RCTL,
+                                   KC_LGUI, KC_LANG2,L_SPC,            R_ENT,   KC_LANG1,KC_RALT,
+                                            KC_A,    KC_B,             KC_C,    KC_D,    KC_E
+    ),
+    [_LOWER] = LAYOUT(
+        _______, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,          XXXXXXX, KC_EQL,  KC_PLUS, KC_ASTR, KC_PERC, _______,
+        _______, KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    _______, KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    _______,
+        _______, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,          XXXXXXX, XXXXXXX, _______, _______, _______, _______,
+                                   _______, _______, _______,          KC_DEL,  _______, _______,
+                                            _______, _______,          _______, _______, _______
+    ),
+    [_RAISE] = LAYOUT(
+        _______, KC_BSLS, KC_EXLM, KC_AMPR, KC_PIPE, XXXXXXX,          XXXXXXX, KC_EQL,  KC_PLUS, KC_ASTR, KC_PERC, _______,
+        _______, KC_HASH, KC_GRV,  KC_DQT,  KC_QUOT, KC_TILD, _______, KC_LEFT, KC_DOWN, KC_UP,   KC_RGHT, KC_DLR,  _______,
+        _______, XXXXXXX, XXXXXXX, KC_LCBR, KC_LBRC, KC_LPRN,          KC_RPRN, KC_RBRC, KC_RCBR, KC_AT,   KC_CIRC, _______,
+                                   _______, _______, KC_BSPC,          _______, _______, _______,
+                                            _______, _______,          _______, _______, _______
+    ),
+    [_ADJUST] = LAYOUT(
+        _______, _______, _______, _______, _______, _______,          _______, _______, _______, _______, _______, _______,
+        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+        _______, _______, _______, _______, _______, _______,          _______, _______, _______, _______, _______, _______,
+                                   _______, _______, _______,          _______, _______, _______,
+                                            _______, _______,          _______, _______, _______
+    ),
+};
diff --git a/keyboards/bat43/keymaps/via/readme.md b/keyboards/bat43/keymaps/via/readme.md
new file mode 100644
index 000000000..f72376d89
--- /dev/null
+++ b/keyboards/bat43/keymaps/via/readme.md
@@ -0,0 +1 @@
+# The default keymap for bat43
diff --git a/keyboards/bat43/keymaps/via/rules.mk b/keyboards/bat43/keymaps/via/rules.mk
new file mode 100644
index 000000000..1e5b99807
--- /dev/null
+++ b/keyboards/bat43/keymaps/via/rules.mk
@@ -0,0 +1 @@
+VIA_ENABLE = yes