Battery pack

Battery packs are a portable way of storing electricity. Many portable electrical devices can use these, at the cost of depleting them. Battery packs are pretty cheap to make, but to make rechargeable battery packs costs a decent amount more.

Builds from
Zinc + Brine = 1 battery pack

Zinc + Manganese  = 3 battery packs

Lithium + Manganese  = 5 battery packs

Builds into
Battery pack + 2 Nickel = Rechargeable battery pack