Stop BatterySystem from iterating over every battery just to recharge micro-reactors (#5393)

Content.Server/Power/Components/BatterySelfRechargerComponent.cs

@@ -0,0 +1,21 @@
+using System;
+using Robust.Shared.GameObjects;
+using Robust.Shared.Maths;
+using Robust.Shared.Serialization.Manager.Attributes;
+using Robust.Shared.ViewVariables;
+
+namespace Content.Server.Power.Components
+{
+    /// <summary>
+    ///     Self-recharging battery.
+    /// </summary>
+    [RegisterComponent]
+    public class BatterySelfRechargerComponent : Component
+    {
+        public override string Name => "BatterySelfRecharger";
+
+        [ViewVariables(VVAccess.ReadWrite)] [DataField("autoRecharge")] public bool AutoRecharge { get; set; }
+
+        [ViewVariables(VVAccess.ReadWrite)] [DataField("autoRechargeRate")] public float AutoRechargeRate { get; set; }
+    }
+}