woops

code/game/objects/items/shields.dm

@@ -389,6 +389,8 @@ obj/item/shield/riot/bullet_proof
 			recharge_timerid = null
 
 /obj/item/shield/riot/implant/proc/recharge()
+	if(obj_integrity == max_integrity)
+		return
 	obj_integrity = max_integrity
 	if(ismob(loc.loc))		//cyberimplant.user
 		to_chat(loc, "<span class='notice'>[src] has recharged its reinforcement matrix and is ready for use!</span>")

code/modules/surgery/organs/augments_arms.dm

@@ -272,7 +272,7 @@
 	contents = newlist(/obj/item/shield/riot/implant)
 
 /obj/item/organ/cyberimp/arm/shield/Extend(obj/item/I)
-	if(item.obj_integrity == 0)				//that's how the shield recharge works
+	if(I.obj_integrity == 0)				//that's how the shield recharge works
 		to_chat(owner, "<span class='warning'>[I] is still too unstable to extend. Give it some time!</span>")
 		return FALSE
 	return ..()