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Fermi35

The nightstand

Engineered with precision. Built around your ecosystem.

₹3,499 · inclusive of all taxes

Prices outside India: United States $29 · United Kingdom £25 · Europe €29. US prices are before sales tax; UK and Europe include VAT.

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How it charges

USB Power Delivery

Built for iPhone, Apple Watch and AirPods charging

Fermi35 charges over USB Power Delivery, the standard USB-C devices use to fast charge. When you plug in, your device and the adapter agree on power in a fraction of a second, before charging begins.

Your device always decides how much power it takes. The adapter offers; the device chooses, based on its battery level, its temperature and its model.

Fermi35 offers these power levels: 5 V 3 A, 9 V 3 A, 12 V 2.92 A, 15 V 2.33 A, 20 V 1.75 A. Your device picks the one it wants.

Simple

  1. You plug in, and the adapter supplies a safe, low level first.
  2. The adapter tells your iPhone what it can offer.
  3. Your iPhone picks the level it wants, and fast charging begins.
  4. As the battery fills, your iPhone takes less.

Engineering

  1. Attach detection. The adapter detects a device on the USB-C cable and supplies a safe 5 volts.
  2. Source capabilities. The adapter sends the power levels it can supply.
  3. Request. Your iPhone asks for one of them.
  4. Accept. The adapter agrees to the request.
  5. PS_RDY. The adapter switches to the agreed level and signals that power is ready.
  6. Your iPhone manages its own charge. As the battery fills or warms, it draws less, and it can ask again.
How USB Power Delivery works: an illustration of the standard, not a capture from Fermi35.

Compatibility

Which iPhone do you have?

Choose your model to see how Fermi35 fits it and which cable you need.

Fermi35 with each iPhone
iPhoneFitCable
iPhone 18 Pro, iPhone 18 Pro MaxStep up to Entropy67.USB-C to USB-C
iPhone DuoWe're still confirming this model.USB-C to USB-C
iPhone 17, iPhone 17 Pro, iPhone 17 Pro MaxStep up to Fermi45.USB-C to USB-C
iPhone Air, iPhone 17eFermi35 fits.USB-C to USB-C
iPhone 16, iPhone 16 Plus, iPhone 16eFermi35 fits.USB-C to USB-C
iPhone 16 Pro, iPhone 16 Pro MaxFermi35 fits.USB-C to USB-C
iPhone 15, iPhone 15 PlusFermi35 fits.USB-C to USB-C
iPhone 15 Pro, iPhone 15 Pro MaxFermi35 fits.USB-C to USB-C
iPhone 14, iPhone 14 Plus, iPhone 14 Pro, iPhone 14 Pro Max, iPhone 13 (all), iPhone 12 (all), iPhone SE (2nd, 3rd gen)Fermi35 fits.USB-C to Lightning (MFi-certified recommended)
iPhone 11 (all), iPhone XS, iPhone XS Max, iPhone XR, iPhone X, iPhone 8, iPhone 8 PlusFermi35 fits.USB-C to Lightning

Newer iPhone models can charge faster with higher-wattage adapters.

Also fits Apple Watch and AirPods Pro 3.

See the full iPhone compatibility table

Safety

Protection built in

Fermi35 has these protections built in:

  • Over-voltage protection
  • Over-current protection
  • Over-temperature protection
  • Short-circuit protection

Indian safety standard

Marked IS 13252 (Part 1), the Indian standard for IT equipment power supplies. How to check a BIS registration

Use and care

  • Keep it in open air while it is plugged in. Don't cover it with a blanket or pillow, or keep it under your body.
  • Keep it dry. Don't use it near a sink, bath or shower, and don't plug it in or unplug it with wet hands.
  • Unplug it and stop using it if the cable is frayed, if the pins or case are damaged, or if it has been in rain or liquid. Unplug it before you clean it.

Ownership

Looked after, for years.

2-year warranty

Register your Fermi35 and keep your warranty even if you lose the invoice.

Register your product

Returns

Refund and Returns

Support

support@eronix.in
+91 90380 72251

Grievance Officer: Vikram

Who you are buying from

Seller
Erobern Technology Solutions Pvt. Ltd. (CIN U72900WB2017PTC223716)
Registered and dispatch address
207 M, Thakurpukur Road, Kolkata, West Bengal 700063
Corporate office
Salarpuria Symbiosis, Bannerghatta Road, Arekere, Bengaluru, Karnataka 560076
GSTIN
19AAECE8644D1ZJ
Grievance officer
Vikram, Grievance Manager · support@eronix.in · +91 90380 72251. Complaints are acknowledged within 48 hours and resolved within one month.
Customer care
support@eronix.in · +91 90380 72251

Terms · Privacy · Refund and Returns · Shipping · Contact

Specifications

Product
Fermi35 · 35 W USB-C adapter
Model
WC35GWHT
Rating (input)
100–240 V ~ 50–60 Hz
Port(s)
2× USB-C (20 + 15 W or 18 + 15 W)
Maximum power
35 W
Power levels
5 V 3 A · 9 V 3 A · 12 V 2.92 A · 15 V 2.33 A · 20 V 1.75 AThe set voltages the adapter offers. Your device picks the one it wants.
Programmable Power Supply (PPS)
3.3–12 V, 3 ALets a phone ask for the exact voltage it wants, in small steps, while it charges.
Protections
Over-voltage, over-current, over-temperature, short-circuit
In the box
Power adapter. Cable not included.
Warranty
2-year warranty
Seller
Erobern Technology Solutions Pvt. Ltd.

Learn more

Completes the set

Xenon

USB-C wired earphone with 14 mm dual titanium drivers, a 24-bit/96 kHz DAC and a metal housing.

Fits iPhone 15 and later and Galaxy S26 Ultra and S series

₹1,999

Leather Wallet

Leather wallet for two cards, magnets matched to the ERONIX case.

Fits iPhone 15 and later

₹3,499

Get Fermi35

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Product information

MRP
₹3,499 (incl. of all taxes)
Manufactured and imported by
Erobern Technology Solutions Pvt. Ltd., 207 M, Thakurpukur Road, Kolkata, West Bengal 700063
Marketed by
Erobern Technology Solutions Pvt. Ltd.
Consumer care
+91 90380 72251 · Contact
Warranty
2-year warranty

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