diff --git a/code/__HELPERS/unsorted.dm b/code/__HELPERS/unsorted.dm
index 5e266fdaa2..6fb7b08611 100644
--- a/code/__HELPERS/unsorted.dm
+++ b/code/__HELPERS/unsorted.dm
@@ -353,9 +353,8 @@ Turf and target are separate in case you want to teleport some distance from a t
var/M = E/(SPEED_OF_LIGHT_SQ)
return M
-//Takes the value of energy used/produced/ect.
-//Returns a text value of that number in W, kW, MW, or GW.
-/proc/DisplayPower(var/powerused)
+// Format a power value in W, kW, MW, or GW.
+/proc/DisplayPower(powerused)
if(powerused < 1000) //Less than a kW
return "[powerused] W"
else if(powerused < 1000000) //Less than a MW
@@ -364,6 +363,21 @@ Turf and target are separate in case you want to teleport some distance from a t
return "[round((powerused * 0.000001),0.001)] MW"
return "[round((powerused * 0.000000001),0.0001)] GW"
+// Format an energy value in J, kJ, MJ, or GJ. 1W = 1J/s.
+/proc/DisplayEnergy(units)
+ // APCs process every (SSmachines.wait * 0.1) seconds, and turn 1 W of
+ // excess power into GLOB.CELLRATE energy units when charging cells.
+ // With the current configuration of wait=20 and CELLRATE=0.002, this
+ // means that one unit is 1 kJ.
+ units *= SSmachines.wait * 0.1 / GLOB.CELLRATE
+ if (units < 1000) // Less than a kJ
+ return "[round(units, 0.1)] J"
+ else if (units < 1000000) // Less than a MJ
+ return "[round(units * 0.001, 0.01)] kJ"
+ else if (units < 1000000000) // Less than a GJ
+ return "[round(units * 0.000001, 0.001)] MJ"
+ return "[round(units * 0.000000001, 0.0001)] GJ"
+
/proc/key_name(whom, include_link = null, include_name = 1)
var/mob/M
var/client/C
diff --git a/code/game/machinery/computer/apc_control.dm b/code/game/machinery/computer/apc_control.dm
index aa644eb738..cbdc28883f 100644
--- a/code/game/machinery/computer/apc_control.dm
+++ b/code/game/machinery/computer/apc_control.dm
@@ -66,7 +66,7 @@
if(result_filters["Responsive"] && !APC.aidisabled)
continue
dat += "[A]
\
- Charge: [DisplayPower(APC.cell.charge)] / [DisplayPower(APC.cell.maxcharge)] ([round((APC.cell.charge / APC.cell.maxcharge) * 100)]%)
\
+ Charge: [DisplayEnergy(APC.cell.charge)] / [DisplayEnergy(APC.cell.maxcharge)] ([round((APC.cell.charge / APC.cell.maxcharge) * 100)]%)
\
Area: [APC.area]
\
[APC.aidisabled || APC.panel_open ? "APC does not respond to interface query." : "APC responds to interface query."]
"
dat += "Check Logs
"
diff --git a/code/game/objects/items/devices/electroadaptive_pseudocircuit.dm b/code/game/objects/items/devices/electroadaptive_pseudocircuit.dm
index 204a1f81d9..7f9a53557c 100644
--- a/code/game/objects/items/devices/electroadaptive_pseudocircuit.dm
+++ b/code/game/objects/items/devices/electroadaptive_pseudocircuit.dm
@@ -30,7 +30,7 @@
to_chat(R, "You need a power cell installed for that.")
return
if(!R.cell.use(circuit_cost))
- to_chat(R, "You don't have the power for that (you need [DisplayPower(circuit_cost)].)")
+ to_chat(R, "You don't have the energy for that (you need [DisplayEnergy(circuit_cost)].)")
return
if(recharging)
to_chat(R, "[src] needs some time to recharge first.")
diff --git a/code/game/objects/items/inducer.dm b/code/game/objects/items/inducer.dm
index e720644055..a2d69764c5 100644
--- a/code/game/objects/items/inducer.dm
+++ b/code/game/objects/items/inducer.dm
@@ -162,7 +162,7 @@
/obj/item/inducer/examine(mob/living/M)
..()
if(cell)
- to_chat(M, "Its display shows: [DisplayPower(cell.charge)].")
+ to_chat(M, "Its display shows: [DisplayEnergy(cell.charge)].")
else
to_chat(M,"Its display is dark.")
if(opened)
diff --git a/code/modules/hydroponics/plant_genes.dm b/code/modules/hydroponics/plant_genes.dm
index c6e17a63a4..92b6b8abaf 100644
--- a/code/modules/hydroponics/plant_genes.dm
+++ b/code/modules/hydroponics/plant_genes.dm
@@ -375,7 +375,7 @@
pocell.maxcharge *= CG.rate*1000
pocell.charge = pocell.maxcharge
pocell.name = "[G.name] battery"
- pocell.desc = "A rechargeable plant based power cell. This one has a power rating of [DisplayPower(pocell.maxcharge)], and you should not swallow it."
+ pocell.desc = "A rechargeable plant-based power cell. This one has a rating of [DisplayEnergy(pocell.maxcharge)], and you should not swallow it."
if(G.reagents.has_reagent("plasma", 2))
pocell.rigged = 1
diff --git a/code/modules/integrated_electronics/passive/power.dm b/code/modules/integrated_electronics/passive/power.dm
index 7c7439d45b..1e65a2b67d 100644
--- a/code/modules/integrated_electronics/passive/power.dm
+++ b/code/modules/integrated_electronics/passive/power.dm
@@ -13,7 +13,7 @@
/obj/item/integrated_circuit/passive/power/solar_cell
name = "tiny photovoltaic cell"
desc = "It's a very tiny solar cell, generally used in calculators."
- extended_desc = "The cell generates 1W of power per second in optimal lighting conditions. Less light will result in less power being generated."
+ extended_desc = "The cell generates 1 W of power in optimal lighting conditions. Less light will result in less power being generated."
icon_state = "solar_cell"
complexity = 8
origin_tech = list(TECH_POWER = 3, TECH_ENGINEERING = 3, TECH_DATA = 2)
diff --git a/code/modules/ninja/suit/gloves.dm b/code/modules/ninja/suit/gloves.dm
index 6cf03d1c10..c49ca072e8 100644
--- a/code/modules/ninja/suit/gloves.dm
+++ b/code/modules/ninja/suit/gloves.dm
@@ -63,9 +63,9 @@
if(isnum(.)) //Numerical values of drained handle their feedback here, Alpha values handle it themselves (Research hacking)
if(.)
- to_chat(H, "Gained [DisplayPower(.)] of power from [A].")
+ to_chat(H, "Gained [DisplayEnergy(.)] of energy from [A].")
else
- to_chat(H, "\The [A] has run dry of power, you must find another source!")
+ to_chat(H, "\The [A] has run dry of energy, you must find another source!")
else
. = 0 //as to not cancel attack_hand()
diff --git a/code/modules/ninja/suit/suit.dm b/code/modules/ninja/suit/suit.dm
index 1dcfed99c0..128997cb98 100644
--- a/code/modules/ninja/suit/suit.dm
+++ b/code/modules/ninja/suit/suit.dm
@@ -152,7 +152,7 @@ Contents:
..()
if(s_initialized)
if(user == affecting)
- to_chat(user, "All systems operational. Current energy capacity: [DisplayPower(cell.charge)].")
+ to_chat(user, "All systems operational. Current energy capacity: [DisplayEnergy(cell.charge)].")
to_chat(user, "The CLOAK-tech device is [s_active?"active":"inactive"].")
to_chat(user, "There are [s_bombs] smoke bomb\s remaining.")
to_chat(user, "There are [a_boost] adrenaline booster\s remaining.")
diff --git a/code/modules/ninja/suit/suit_initialisation.dm b/code/modules/ninja/suit/suit_initialisation.dm
index 0084ff1995..e19e67404d 100644
--- a/code/modules/ninja/suit/suit_initialisation.dm
+++ b/code/modules/ninja/suit/suit_initialisation.dm
@@ -42,7 +42,7 @@
addtimer(CALLBACK(src, .proc/ninitialize_six, delay, U), delay)
/obj/item/clothing/suit/space/space_ninja/proc/ninitialize_six(delay, mob/living/carbon/human/U)
- to_chat(U, "Primary system status: ONLINE.\nBackup system status: ONLINE.\nCurrent energy capacity: [DisplayPower(cell.charge)].")
+ to_chat(U, "Primary system status: ONLINE.\nBackup system status: ONLINE.\nCurrent energy capacity: [DisplayEnergy(cell.charge)].")
addtimer(CALLBACK(src, .proc/ninitialize_seven, delay, U), delay)
/obj/item/clothing/suit/space/space_ninja/proc/ninitialize_seven(delay, mob/living/carbon/human/U)
diff --git a/code/modules/power/cell.dm b/code/modules/power/cell.dm
index acbebea458..625f99a040 100644
--- a/code/modules/power/cell.dm
+++ b/code/modules/power/cell.dm
@@ -29,7 +29,7 @@
START_PROCESSING(SSobj, src)
charge = maxcharge
if(ratingdesc)
- desc += " This one has a power rating of [DisplayPower(maxcharge)], and you should not swallow it."
+ desc += " This one has a rating of [DisplayEnergy(maxcharge)], and you should not swallow it."
update_icon()
/obj/item/stock_parts/cell/Destroy()
diff --git a/code/modules/research/designs/power_designs.dm b/code/modules/research/designs/power_designs.dm
index d5526e9509..a6ef6cd2bf 100644
--- a/code/modules/research/designs/power_designs.dm
+++ b/code/modules/research/designs/power_designs.dm
@@ -4,7 +4,7 @@
/datum/design/basic_cell
name = "Basic Power Cell"
- desc = "A basic power cell that holds 1 kW of power."
+ desc = "A basic power cell that holds 1 MJ of energy."
id = "basic_cell"
req_tech = list("powerstorage" = 1)
build_type = PROTOLATHE | AUTOLATHE |MECHFAB
@@ -15,7 +15,7 @@
/datum/design/high_cell
name = "High-Capacity Power Cell"
- desc = "A power cell that holds 10 kW of power."
+ desc = "A power cell that holds 10 MJ of energy."
id = "high_cell"
req_tech = list("powerstorage" = 2)
build_type = PROTOLATHE | AUTOLATHE | MECHFAB
@@ -26,7 +26,7 @@
/datum/design/super_cell
name = "Super-Capacity Power Cell"
- desc = "A power cell that holds 20 kW of power."
+ desc = "A power cell that holds 20 MJ of energy."
id = "super_cell"
req_tech = list("powerstorage" = 3, "materials" = 3)
build_type = PROTOLATHE | MECHFAB
@@ -37,7 +37,7 @@
/datum/design/hyper_cell
name = "Hyper-Capacity Power Cell"
- desc = "A power cell that holds 30 kW of power."
+ desc = "A power cell that holds 30 MJ of energy."
id = "hyper_cell"
req_tech = list("powerstorage" = 5, "materials" = 5, "engineering" = 5)
build_type = PROTOLATHE | MECHFAB
@@ -48,7 +48,7 @@
/datum/design/bluespace_cell
name = "Bluespace Power Cell"
- desc = "A power cell that holds 40 kW of power."
+ desc = "A power cell that holds 40 MJ of energy."
id = "bluespace_cell"
req_tech = list("powerstorage" = 6, "materials" = 5, "engineering" = 5, "bluespace" = 5)
build_type = PROTOLATHE | MECHFAB