diff --git a/src/tabs/power.html b/src/tabs/power.html
index 8397b375e3..686b85865c 100644
--- a/src/tabs/power.html
+++ b/src/tabs/power.html
@@ -172,7 +172,7 @@
             </label>
         </div>
         <div class="number">
-            <label> <input type="number" name="capacity" step="1" min="0" max="65535" /> <span
+            <label> <input type="number" name="capacity" step="1" min="0" max="20000" /> <span
                 i18n="powerBatteryCapacity"></span>
             </label>
         </div>
@@ -203,7 +203,7 @@
             </label>
         </div>
         <div class="number">
-            <label> <input type="number" name="amperageoffset" step="1" min=-32000" max="32000" /> <span
+            <label> <input type="number" name="amperageoffset" step="1" min="-32000" max="32000" /> <span
                 i18n="powerAmperageOffset"></span>
             </label>
         </div>