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RetroPower PSU TI-99/4A OLED Digital International Power Supply.

 OLED Display, Touch Sensor.


Reliable replacement Texas Instruments TI-99/4A power supply unit. Is it time to replace your TI-99 PSU ?


Choice of UK, Europe & Australia or USA plug

  • 230V AC power socket (IEC 60320) with EU/UK/AU cable
  • US-standard 120V AC power plug (U.S., Canada, Mexico, Japan, and others)


High-quality Texas Instruments TI-99/4A replacement power supply unit (PSU). Designed specifically for TI-99/4A systems to preserve them in a pristine condition for years to come. Stabilized +5V/4.0A, +12V/2.0A, and -5V/0.5A DC ensure continued error-free operation of your TI-99/4A. Robust and sturdy chassis with an OLED digital display, touch sensor, and different styles and colors to chose from. Fully fused and electrically protected, with specialized 4-pin plug matching the original TI-99/4A PSU pinout. Requires a minor modification consisting of disconnecting the built-in TI-99/4A power supply board.



  • Replacement power supply for Texas Instruments TI-99/4A
  • Stabilized +5V/4.0A, +12V/2.0A, -5V/0.5A DC output (requires disconnecting the built-in PSU board)
  • OLED display with digital voltage and time readout
  • Touch sensor for toggling OLED display screens
  • Over-voltage and over-current protection
  • Fused on AC and DC side and fully isolated
  • Output voltages on universal DIN socket
  • Output power cable included with DIN plugs
  • High quality chassis with digital OLED display
  • Durable and thick cables on both sides
  • Runs cold
  • Weight only 0.6 kg (1.3 lb)
  • Compact enclosure with modern shape 158 mm x 71 mm x 51 mm (6.2" x 2.8" x 2.0")
  • Specialized 4-pin plug with +5V/+12V/-5V DC


*Despatch time of approx 7 days, This item may be sent separately from any other items you order.

^ Texas Instruments TI-99/4A RetroPower PSU OLED Digital (UK,EU,AU,USA)

PriceFrom £79.00
    • UK standard 230v (3-pin) (UK, Ireland, Malta, Cyprus, Malaysia, Singapore etc)
    • Australia standard 230v (3-pin) (Australia, New Zealand, Tasmania etc)
    • Europe 230v (2-pin)
    • USA 120v (3-pin) (USA, Canada, Mexico, Japan etc)
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