Tiny-C

Product

Charge your Audioroot smart batteries using a USB-C PPS power supply.

Audioroot eSMART TINY-C is an ultra-compact smart battery charger that turns your USB-C PPS-compatible power supply or charger into a full-featured charger for your Audioroot eSMART Li-xxWh and NEO batteries. Small enough to disappear into a pouch, clever enough to charge at up to 4.0 amps — the TINY-C is the pocket-sized brain that sits between your USB-C power source and your battery.

What is USB-C PPS — and why is it so powerful?
PPS stands for Programmable Power Supply, one of the most advanced charging standards built into the USB Power Delivery (USB-PD 3.0) specification. With a traditional charger, you can only pick from a handful of fixed voltage steps — 5 V, 9 V, 15 V, 20 V — and the charger decides the rest. PPS changes the rules: it allows the voltage and current to be adjusted in real time, in fine steps, while charging is in progress.

Why that matters for your batteries: Precise charging control — Instead of forcing the battery to fit a fixed voltage, PPS lets the charger deliver exactly the voltage the battery asks for, moment to moment. The charge profile follows the battery instead of the other way around.

Real-time adjustment — As the battery fills up, the TINY-C continuously renegotiates the power it draws from the supply, matching the optimal charging current and voltage at every stage of the charge cycle.

One standard, endless flexibility — A compliant USB-C PPS power supply can become your battery charger. Travel light: the same charger that tops up your laptop can top up your eSMART batteries.

In short: the USB-C PPS power supply does all the heavy lifting, and the TINY-C is the brain that controls it. The TINY-C monitors the battery's charging parameters and state of charge (SoC) in real time, telling the power supply exactly what the battery needs at every moment.

A beautiful blue OLED screen shows you, in real time:

• Charging current
• Battery voltage
• Battery capacity (%)
• Cycle count
• Estimated charging time remaining

No guessing, no surprises. You always know exactly where your battery stands.

Features

• Ultra-compact, pocketable design
• Charges Audioroot eSMART Li-xxWh and NEO smart batteries
• Works with any USB-C PPS-compatible power supply or charger (please see further down below for exact requirements)
• Fast charging at up to 4.0 A
• Real-time monitoring of charging parameters and state of charge (SoC)
• Blue OLED display: current, voltage, capacity %, cycle count, and estimated time to full charge
• Programmable end-of-charge capacity: 100% / 80% / 60% / 30% at the press of a button
• Charge smarter, travel lighter, and make your batteries last longer

Power supply requirements

A USB-PD 3.0+ PPS-compatible USB-C power supply is required to operate the TINY-C. It will not work with standard USB-C PD that only delivers fixed profiles (5 V, 12 V, 15 V, 20 V). Note that some smaller USB-C chargers, although PPS-compatible, only cover a lower voltage range (e.g., 3.3–6.0 V) — these are not compatible with the TINY-C, as it requires the PPS voltage to go up to 20.0 V to operate. The TINY-C has been mainly tested with 65 W and higher USB-C PPS power supplies. You can run 2 × TINY-C from a single USB-C PPS power supply/charger, but we recommend a 200 W+ supply in that case. For best compatibility and fastest charging, choose a 100 W+ USB-C PPS PSU. Stay tuned for firmware updates that will expand compatibility.

For convenience you can buy directly from us USB-C PPS compatible chargers tested by Audioroot: the eStuff ES635201 4-Port 120 W USB-A/USB-C Charger (PD, QC 3.0) and the SIIG AC-PW1N11-S1 4-Port 100 W USB-C Charging Station (2× USB-C + 2× USB-A, PPS, PD, QC 3.0).