How Eco Mode Extends IQOS ILUMA i Battery Life

By TEREA 365 Editorial · 15 April 2026 · updated 13 April 2026 · 6 min read

This guide explains what Eco Mode (FlexBattery) does to IQOS ILUMA i battery life, how to switch it on through the IQOS app, and which ILUMA i models support it. You will also find quick fixes for the app issues we hear about most from customers picking up devices in Dubai, Sharjah and Ajman.

How Eco Mode Extends IQOS ILUMA i Battery Life

What Eco Mode Actually Does to Your IQOS ILUMA i Battery Life

Eco Mode, which IQOS also calls FlexBattery, is a background setting that changes how your IQOS ILUMA i battery life holds up over months of daily charging, rather than how a single session tastes or draws. Switch it on once in the IQOS app and it keeps running quietly without asking anything else of you.

In normal mode, the device draws full power on every session. With Eco Mode on, it manages that power in a smarter, more controlled way across sessions, aimed at easing long-term strain on the cell rather than stretching out one charge. You will not notice a difference in how a TEREA stick tastes or how the draw feels; the change happens underneath, in how the battery ages.

Eco Mode works alongside other features on the ILUMA i, such as Pause Mode, which lets you stop a session partway through and resume it shortly after instead of wasting it, and FlexPuff, which adjusts slightly to how you actually draw rather than locking you into a fixed pattern. The SMARTCORE induction system removes the blade entirely, so there is no burning process, no ash or residue, and no cleaning required between sticks. None of this replaces what Eco Mode does for the battery, but together they are why daily use on the ILUMA i feels different from older heat-not-burn generations.

Because Eco Mode works in the background, there is no dramatic before-and-after to check after a single day. Judge it over weeks, not sessions.

How to Turn On Eco Mode (FlexBattery) on ILUMA i

Eco Mode sits inside the IQOS app rather than on the device itself, so have your phone and Bluetooth ready before you start.

Once it is switched on, there is nothing else to manage. The device keeps applying it automatically in the background from that point.

Open the IQOS app
Connect your ILUMA i device over Bluetooth
Go into the device settings
Find Eco Mode or FlexBattery
Turn it on

Eco Mode vs Normal Mode: What Actually Changes

Set side by side, the two modes differ in how the battery is treated, not in how the device performs for you day to day.

Eco Mode is not about holding the device back, it is about protecting it. The honest trade-off: if you want the strongest output on every single session and are not concerned with how the battery behaves eighteen months from now, Normal Mode is the more direct choice.

Battery usage: Eco Mode manages power in a smarter, optimised way; Normal Mode draws full power on every session
Long-term battery health: Eco Mode gives better protection; Normal Mode leaves the battery to standard wear
Daily experience: Eco Mode feels stable and balanced; Normal Mode gives a stronger, more consistent output
Best suited to: Eco Mode suits regular, everyday users; Normal Mode suits people chasing maximum output every session

Why Long-Term Battery Health Matters More Than One Charge

Most people judge a device by how long one charge lasts. The more useful question for anyone using an IQOS ILUMA i daily is how the battery holds up after hundreds of charge cycles, not just the first ten.

We get asked for exact IQOS ILUMA i battery capacity and mAh figures fairly often at the counter. IQOS does not publish those numbers to retailers, so we are not going to guess at a figure we cannot confirm. What we can tell you, from watching devices come back for support over time, is that the pattern Eco Mode is built around, protecting the cell rather than maximising one single charge, is the part that matters for daily users.

Battery health stays more stable
Device performance remains consistent
Long-term degradation slows down
Charging efficiency improves over time

Which ILUMA i Devices Support Eco Mode

Eco Mode is available across the full ILUMA i range, so the choice between models comes down to feel and portability rather than which one gets the battery feature.

Whichever one you pick, the same smart features, including Eco Mode, Pause Mode and FlexPuff, apply across the range.

IQOS ILUMA i Prime: premium, advanced design
IQOS ILUMA i Standard: balanced and practical for everyday use
IQOS ILUMA i One: compact and simple for portability

Compatible TEREA Sticks for ILUMA i Devices

The ILUMA i system works only with TEREA sticks made for SMARTCORE induction heating, not with sticks designed for older, blade-based devices. Eco Mode has no bearing on which stick you use; it is purely a power-management setting on the device.

Each of these gives a different taste, but all are made for the same consistent heating performance on ILUMA i devices.

TEREA Amber: smooth, warm tobacco with a slightly rich aroma
TEREA Bronze: stronger, deeper tobacco taste with a bold feel
TEREA Green Zing: light, fresh menthol with a citrusy cooling twist
TEREA Purple Menthol: fresh and cooling feel
TEREA Rich Regular: strong tobacco taste
TEREA Smooth Regular: smooth, everyday option

Fixing Common Eco Mode Problems

Eco Mode usually works without any fuss, but a few small issues come up often enough in the app that they are worth knowing before you assume something is broken. Most of the time it is an outdated app, a weak Bluetooth connection, or simply expecting an instant battery change when Eco Mode actually works slowly in the background.

A simple update resolves most of these. If none of it works after that, the fault is more likely sitting on the app's side than yours, and that is one for IQOS support rather than something to keep troubleshooting alone.

Eco Mode not showing: update the app and the device software
Bluetooth not connecting: restart your phone and reconnect
Settings not saving: log out of the app and log back in
No battery change noticed: give it time, the effect builds over weeks
App not syncing: reinstall the app or clear its cache

Daily Habits That Support Eco Mode and Battery Life

Eco Mode carries most of the load, but the habits around daily charging still matter. None of this is complicated, and most regular ILUMA i users end up doing it without thinking about it.

Most of the customers who tell us their device still performs well after a long time say the same thing: they do not overthink it, they charge normally, keep Eco Mode on, and let it run.

Avoid overcharging overnight on a regular basis
Charge before the battery fully drains rather than waiting until it cuts out
Keep the device away from heat and direct sunlight
Use the original charger and charging accessories only
Store it somewhere dry when it is not in use
Leave Eco Mode on for daily use

What to Do Next If You're Buying or Restocking in the UAE

If your ILUMA i is due for a TEREA restock, or you are choosing between the ILUMA i Prime, ILUMA i Standard and ILUMA i One, TEREA 365 delivers within 1-2 hours across Dubai, Sharjah and Ajman, and within 24 hours to the rest of the UAE. Order over WhatsApp on +971561652004 and pay cash or by card on delivery.

TEREA 365 is an independent UAE retailer of IQOS ILUMA devices, TEREA sticks, HEETS and RELX pods, and is not affiliated with IQOS, TEREA, HEETS, RELX or their manufacturers.

Frequently asked questions

How do I turn Eco Mode on for my IQOS ILUMA i?

Open the IQOS app, connect your ILUMA i over Bluetooth, then go to settings and find Eco Mode or FlexBattery. Turn the toggle on and the device applies it automatically from then on, no further steps needed. It works the same way across the ILUMA i Prime, Standard and One.

How do I turn Eco Mode off if I want full power on every session?

Go back into the same Eco Mode or FlexBattery setting in the IQOS app and switch it off. Your ILUMA i will then run at full power every session rather than the smarter, controlled usage Eco Mode applies, which is a fair trade if you value consistently strong output over long-term battery protection.

Does Eco Mode change how a TEREA stick tastes?

No. Eco Mode changes background power management, not the heating profile behind each draw, so the taste and feel of TEREA sticks such as Amber, Bronze or Green Zing stay the same. The difference Eco Mode makes is in how the battery ages over months of use, not in what you taste during a session.

Which IQOS ILUMA i models support Eco Mode?

All three: the IQOS ILUMA i Prime, IQOS ILUMA i Standard and IQOS ILUMA i One support Eco Mode, so the choice between them comes down to design and portability rather than battery features. The premium ILUMA i Prime, the balanced ILUMA i Standard and the compact ILUMA i One all run the same background power management once switched on.

What should I do if Eco Mode is not showing up in the app?

Start by updating both the IQOS app and your device software, since an outdated version is the most common cause. If it still will not appear, restart your phone, reconnect over Bluetooth, and try logging out of the app and back in. Most cases clear up after an update rather than needing any deeper fix.

Do I need different TEREA sticks to use Eco Mode?

No. Eco Mode is a setting on the device itself and works with any TEREA stick made for SMARTCORE induction heating, including Amber, Bronze, Green Zing, Purple Menthol, Rich Regular and Smooth Regular. There is no separate Eco Mode stick, and switching the setting on or off has no effect on which sticks you can use.