Energy Efficiency
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“Before completion: Upgrade your jade bot to gather more energy from jade tech batteries.
Additionally, your jade bot can now absorb energy from zip lines.After completion: Your jade bot will now get 2 charges from jade batteries, to a maximum of 4. Your jade bot can now gather charges from zip lines.
You can now craft tier 7 and tier 8 power cores.— In-game description
Energy Efficiency is a mastery that further upgrades the jade bot to hold additional charges and allows the player to craft higher tier Power Cores.
Notes[edit]
Jade Power Charges can be obtained by interacting with 
Jade Batteries around Cantha.- Without the mastery, you can obtain only one charge per battery.
