more fixes

code/game/objects/items/weapons/power_cells.dm

@@ -18,6 +18,17 @@
 	var/minor_fault = 0 //If not 100% reliable, it will build up faults.
 	var/chargerate = 1000 //how much power is given every tick in a recharger
 	var/self_recharge = 0 //does it self recharge, over time, or not?
+	var/grown_battery = FALSE // If it's a grown that acts as a battery, add a wire overlay to it.
+
+/obj/item/weapon/stock_parts/cell/New()
+	..()
+	processing_objects.Add(src)
+	charge = maxcharge
+	updateicon()
+
+/obj/item/weapon/stock_parts/cell/Destroy()
+	processing_objects.Remove(src)
+	return ..()
 
 /obj/item/weapon/stock_parts/cell/suicide_act(mob/user)
 	to_chat(viewers(user), "<span class='suicide'>[user] is licking the electrodes of the [src.name]! It looks like \he's trying to commit suicide.</span>")
@@ -29,6 +40,17 @@
 	else
 		return PROCESS_KILL
 
+/obj/item/weapon/stock_parts/cell/proc/updateicon()
+	overlays.Cut()
+	if(grown_battery)
+		overlays += image('icons/obj/power.dmi', "grown_wires")
+	if(charge < 0.01)
+		return
+	else if(charge/maxcharge >=0.995)
+		overlays += image('icons/obj/power.dmi', "cell-o2")
+	else
+		overlays += image('icons/obj/power.dmi', "cell-o1")
+
 /obj/item/weapon/stock_parts/cell/crap
 	name = "\improper Nanotrasen brand rechargable AA battery"
 	desc = "You can't top the plasma top." //TOTALLY TRADEMARK INFRINGEMENT
@@ -119,14 +141,15 @@
 /obj/item/weapon/stock_parts/cell/potato
 	name = "potato battery"
 	desc = "A rechargable starch based power cell."
-	origin_tech = "powerstorage=1"
-	icon = 'icons/obj/power.dmi' //'icons/obj/harvest.dmi'
-	icon_state = "potato_cell" //"potato_battery"
+	icon = 'icons/obj/hydroponics/harvest.dmi'
+	icon_state = "potato"
+	origin_tech = "powerstorage=1;biotech=1"
 	charge = 100
 	maxcharge = 3000
-	rating = 1
 	materials = list()
+	rating = 1
 	minor_fault = 1
+	grown_battery = TRUE //it has the overlays for wires
 
 /obj/item/weapon/stock_parts/cell/high/slime
 	name = "charged slime core"