The YiHi SX735J chipset is designed for premium single‑battery devices (18650/20700/21700). It offers multiple modes including Watt, Temp Control, Voltage, and the Exclusive Pure mode designed by YiHi. Despite its advanced features, operation is simple.

Power On & Off

• Power on: press fire button 5 times quickly, logo appears, then main screen.
• Power off: 5 clicks → main menu → System Off → Shutdown.
• Lock/Unlock: press fire button 3 times to prevent misfires or child use.

Mode Selection

From the Mode menu, choose:

• Watt Mode: adjustable wattage for different atomizers.
• Temp Mode: Constant (stable) or Dynamic (fluctuating) control; supports Ni200, SS316L, and custom TCR.
• V.VOL Mode: fixed voltage output.
• Pure Mode: Exclusive Pure mode designed by YiHi for stable and clean output.

Wattage & Flavor Settings

• In Watt Mode: scroll down → choose Soft, Neutral, Strong, or SXi‑EQ1/2/3.
• Custom Curves (SXi‑EQ): adjust output every 0.5s, from 50%–200%.
• In Temp Mode: switch between NORM, COOL, COLD, HOT, WARM, or use SXi‑EQ1 for a custom temp curve.

Shortcuts & Features

• Resistance Lock: when atomizer changes, system asks to use old or new resistance.
• Brightness: menu → Tweaks → Brightness (10–100%).
• Screen Timeout: adjustable 15–90s.
• Temp Units: switch °C / °F.
• Room Temp Compensation: ensures accurate TC.
• Puff Counter: lifetime vs daily puffs; daily can reset, lifetime cannot (max 9,999,999).

Protections

• Low Voltage: <3.2V → Low Battery.
• Short Circuit: output stops immediately.
• Low Resistance: <0.1Ω → no output.
• Overcharge: stops at 4.2V ±0.05V.
• Reverse Polarity: device protected if battery is inserted incorrectly.

Key Specs

• • Input Voltage: 3.4V–4.2V
  • Wattage Range: 5–100W (depends on coil)
  • Standby Current: <10uA
  • Display: 0.96" TFT, 180×60 resolution
  • 8 Language options
    • Firmware upgradableFirmware upgradable
    • Firmware upgradable

Quick Summary

• • 5 clicks fire = on/off, 3 clicks = lock/unlock
  • Four modes: Watt / Temp / Voltage / Exclusive Pure mode designed by YiHi
  • Flavor curves & modes with full customization
  • Adjustable brightness, timeout, and temp units
  • Complete protections: low‑voltage, short, low‑res, overcharge, reverse polarity