This mod that adds various baubles/curios.

Requirements

Minecraft 1.16.5
Reasonably recent Forge
BDLib - latest version
Curios API
Scalable Cat's Force (scala library)

Added Items:

Portable Flux Bridge Receiver

Goes into Gadget slot
Right click on a Flux Bridge Transmitter
Will charge other FE/RF Curios/Baubles, Armor and Tools

Pocket Dimension Backpack

Goes into Back slot
Can hold 6*9 items
Can be opened with a hotkey when equipped (by default CTRL+E)

Personal Integrity Field Projector

Goes into Gadget slot
Consumes FE/RF energy to protect the wearer from damage

Kinetic Movement Enhancer

Goes into Legs slot
Increases run speed and lets you step over obstacles (toggle with CTRL+R)
Increases jump height (toggle with CTRL+J)
Protects from falling damage

Added Blocks:

Flux Bridge Transmitter

Transfers FE/RF power to Portable Flux Bridge Receivers
Right click the block with the item in your hand to link them, once linked the receiver will charge your other items wirelessly, even across dimensions.

This mod is in early development stages, more stuff will be added before release.

Open Source

The mod is licensed under the MIT License, the source code is available on GitHub.
Yes this means you have permission to add it to any public or private mod pack.