Cell chargers are now buildable and (upgradable!) machines.

code/modules/power/cell.dm

@@ -172,6 +172,7 @@
 /obj/item/stock_parts/cell/crap/empty/Initialize()
 	. = ..()
 	charge = 0
+	update_icon()
 
 /obj/item/stock_parts/cell/upgraded
 	name = "upgraded power cell"
@@ -195,6 +196,7 @@
 /obj/item/stock_parts/cell/secborg/empty/Initialize()
 	. = ..()
 	charge = 0
+	update_icon()
 
 /obj/item/stock_parts/cell/pulse //200 pulse shots
 	name = "pulse rifle power cell"
@@ -228,6 +230,7 @@
 /obj/item/stock_parts/cell/high/empty/Initialize()
 	. = ..()
 	charge = 0
+	update_icon()
 
 /obj/item/stock_parts/cell/super
 	name = "super-capacity power cell"
@@ -240,6 +243,7 @@
 /obj/item/stock_parts/cell/super/empty/Initialize()
 	. = ..()
 	charge = 0
+	update_icon()
 
 /obj/item/stock_parts/cell/hyper
 	name = "hyper-capacity power cell"
@@ -252,6 +256,7 @@
 /obj/item/stock_parts/cell/hyper/empty/Initialize()
 	. = ..()
 	charge = 0
+	update_icon()
 
 /obj/item/stock_parts/cell/bluespace
 	name = "bluespace power cell"
@@ -265,6 +270,7 @@
 /obj/item/stock_parts/cell/bluespace/empty/Initialize()
 	. = ..()
 	charge = 0
+	update_icon()
 
 /obj/item/stock_parts/cell/infinite
 	name = "infinite-capacity power cell!"
@@ -318,6 +324,7 @@
 /obj/item/stock_parts/cell/emproof/empty/Initialize()
 	. = ..()
 	charge = 0
+	update_icon()
 
 /obj/item/stock_parts/cell/emproof/emp_act(severity)
 	return

code/modules/research/designs/machine_designs.dm

@@ -419,3 +419,10 @@
 	id = "donksofttoyvendor"
 	build_path = /obj/item/circuitboard/machine/vending/donksofttoyvendor
 	category = list ("Misc. Machinery")
+
+/datum/design/board/cell_charger
+	name = "Machine Design (Cell Charger Board)"
+	desc = "The circuit board for a cell charger."
+	id = "cell_charger"
+	build_path = /obj/item/circuitboard/machine/cell_charger
+	category = list ("Misc. Machinery")

code/modules/research/techweb/all_nodes.dm

@@ -64,7 +64,7 @@
 	description = "A refresher course on modern engineering technology."
 	prereq_ids = list("base")
 	design_ids = list("solarcontrol", "recharger", "powermonitor", "rped", "pacman", "adv_capacitor", "adv_scanning", "emitter", "high_cell", "adv_matter_bin",
-	"atmosalerts", "atmos_control", "recycler", "autolathe", "high_micro_laser", "nano_mani", "weldingmask", "mesons", "thermomachine", "tesla_coil", "grounding_rod", "apc_control")
+	"atmosalerts", "atmos_control", "recycler", "autolathe", "high_micro_laser", "nano_mani", "weldingmask", "mesons", "thermomachine", "tesla_coil", "grounding_rod", "apc_control", "cell_charger")
 	research_cost = 2500
 	export_price = 5000