TotK Battery Upgrades: Energy Wells, Costs and Max

Your Energy Cell powers every Zonai device you build with. It starts small: three Energy Wells, enough for a short flight. This page covers how to grow it, from mining Zonaite to the refinery where a Steward Construct fits each new Energy Well, what every step costs, and where the maximum is.

How far can you upgrade the Energy Cell?

	Value
Energy Wells at the start	3
Energy Wells you can add	45
Energy Wells at the maximum	48
Cost of one Energy Well	100 Crystallized Charges
Cost from 3 to 48	4,500 Crystallized Charges
Energy Wells per segment of the gauge	3
Segments on the gauge	8

The game text puts it plainly: the Steward Construct at the refinery says an Energy Cell has 45 slots for expansion. The first 24 wells fill the eight segments; from the 25th on, each new well turns part of a segment blue, and a blue segment holds twice as much. At 48 all eight segments are blue.

What does each battery upgrade cost?

Every Energy Well costs the same 100 charges, so the price only adds up. Each row is one more full segment of the gauge.

Energy Wells	Gauge	Charges spent so far	Charges to the maximum
3 (start)	1 segment	0	4,500
6	2 segments	300	4,200
9	3 segments	600	3,900
12	4 segments	900	3,600
15	5 segments	1,200	3,300
18	6 segments	1,500	3,000
21	7 segments	1,800	2,700
24	8 segments	2,100	2,400
30	8 segments, 2 blue	2,700	1,800
36	8 segments, 4 blue	3,300	1,200
42	8 segments, 6 blue	3,900	600
48 (maximum)	8 segments, all blue	4,500	0

In Zonaite, one Energy Well is 300 Zonaite or 15 Large Zonaite traded at a Forge Construct; the whole 4,500 is 13,500 Zonaite or 675 Large Zonaite.

How much are the different charges worth?

Item	Worth	Where it mostly comes from
Crystallized Charge	1	Forge Constructs (3 Zonaite each), enemies in the Depths
Large Crystallized Charge	20	Forge Constructs (3 Large Zonaite each), Depths chests, loose in the Depths, Frox
Huge Crystallized Charge	100	Guarded chests in the Depths

The game adds all three straight into one total: its item text says a Large Crystallized Charge is “equal to 20 normal crystallized charges” and a Huge one “equal to 100”.

How do you upgrade the Energy Cell?

1. Mine Zonaite in the Depths. The Mining Cave on Great Sky Island has a little Zonaite, but the Steward Construct warns it is not enough for even one Energy Well. The Depths have far more, and every Frox carries Zonaite ore on its back that drops Zonaite and sometimes Large Zonaite.
2. Wake a Forge Construct. The ten in the Depths stand at abandoned mines and are dormant until you activate them with your right arm; at several you first have to drive off the Yiga Clan members camped there.
3. Trade the ore for charges. Three Zonaite buy one Crystallized Charge and three Large Zonaite buy one Large Crystallized Charge. Large Zonaite goes much further: 15 of them pay for a whole Energy Well.
4. Collect loose charges in the Depths. Pick up Large Crystallized Charges lying on the ground, open stone Zonai chests and beat enemies; the table below counts them.
5. Go to a Crystal Refinery. Travel to Great Sky Island or to the refinery just north of Lookout Landing and talk to the Steward Construct.
6. Trade 100 charges per Energy Well. Each well takes 100 charges from your total; come back with more until you reach 48.

Where do you find Crystallized Charges in the Depths?

The game’s placement data has these Large and Huge Crystallized Charges in the Depths:

Where	Large Crystallized Charges	Huge Crystallized Charges
Lying on the ground	50	0
Stone Zonai chests	49	0
Chests guarded by the Yiga Clan (open once they are beaten)	37	4
Other chests that open once the nearby enemies are beaten	0	12

Enemies in the Depths also drop Crystallized Charges. A Frox drops one or two Large Crystallized Charges when beaten, and each of the temple bosses’ rematches in the Depths is said to drop a Huge Crystallized Charge. The Frox page maps all 40.

Where are the Crystal Refineries and Forge Constructs?

SurfaceSkyDepths

All regions Great Sky IslandHyrule FieldAkkalaEldinGerudoLanayruNecludaTabantha All kinds Crystal Refinery (2)Forge Construct (11) Hide defeated

• Crystal Refinery (2)
• Forge Construct (11)

Drag to move and zoom in to tell the points apart; on a computer, click the map first and the mouse wheel zooms it. Ticks are saved in this browser only; no account is needed.

Above the Depths there are two Crystal Refineries and one Forge Construct. Coordinates are X, Y as the in-game map shows them.

#	What	Layer	Where	X, Y
1	Crystal Refinery	Sky	Great Sky Island	0360, -1651
2	Crystal Refinery	Surface	Lookout Landing	-0217, 0194
3	Forge Construct	Sky	Great Sky Island	0471, -1687

The Great Sky Island refinery stands beside Nachoyah Shrine; the Forge Construct is in the Mining Cave on the same island. The other ten Forge Constructs are in the Depths, one at each of these abandoned mines:

Click a coordinate to show that spot on the map above. In the game, move the map cursor until the X, Y readout matches, then drop a pin.

What happens when the Energy Cell is maxed?

Once you have all 48 Energy Wells, the Steward Constructs at the refineries stop making wells and instead trade Crystallized Charges for any Zonai device you choose: 3 charges for most devices, 30 for a Big Battery. That makes the refinery the one place to pick exactly the device you want; the Zonai devices page lists them all.

How does the Energy Cell recharge?

• By itself. A Steward Construct on Great Sky Island explains that the Energy Cell refills whenever no Zonai device is using it.
• With a Zonai Charge. Using one from the menu restores a little energy.
• With a Large Zonai Charge. Using one keeps the Energy Cell from draining for a short time, going by the game’s item text.

See also

More: all 27 Zonai devices and 30 Device Dispensers, Frox locations, temple boss rematches and Lightroots in the Depths.