H2O 500 Cordless Humidifier directions and set-up

Yay for your new H2O 500 Cordless Humidifier. Your plants new best buddy comes complete with everything you need to plug and go, runs both corded or cordless, ready to put an end to those brown, dry edges, crispy leaves, dry tips, and sort out curling and wilting leaves for all your humidity loving indoor plants. Spoil your house plants. Give them not just what they need, but what they love.

Here's how to set up your H2O 500, the different modes and settings, tips and more...


H2O 500 Humidifier

What does it come with?

Included in the box is the top and base unit, USB charging cord, and 2 wicks. One is already installed, the other is a spare, giving you an average of 6 months run-time until you need a new wick (spare humidifier wicks available here). Getting set-up is super easy. Here's how...

How do I get set up?


Unbox your H2O 500 Cordless Humidifier. One cotton core filter is already installed, ready to go. Put your spare somewhere for safekeeping (and somewhere you won't lose it), as you won't need it for 3 months or so.


If you're not charging by plugging directly in to a USB port, then grab your phone or speaker charging brick (not supplied), and plug in the USB charging cord (supplied). The USB charging port is underneath the settings button, on the back of your H2O.

Make sure to charge 
for at least 2 hours minimum the first time, even if the battery display says FULL before the time is up. The battery display on the front will show a lightning bolt symbol to confirm it's on charge.


Once fully charged, the battery display will show 'FU' for full. Unplug the USB cord from the top of the humidifier. Twist to un-screw the top from the base and lift the top off the base.

Fill the base with tap water to the 'MAX 500ML' line. Twist the top back on the base and wait 10 minutes for the unit to prime (water needs to thoroughly soak the cotton core). If yours has a protective sticker over the top of the mist output, remove the sticker before first use.

TIP: If you've primed your H2O for 10 minutes but nothing happens when you turn your humidifier on, the wick might not be fully saturated yet. Either wait longer, or simply untwist the wick cover, and flip the wick upside-down, so it's evenly soaked the full length of the wick.

Then off you go! Have a play with the different settings below...

What do the buttons do?

The settings button on the back controls both the 2 mist settings (short presses), and Night Light mode (long presses). The USB plug port is on the back also. The battery and charging indicator is on the front. The different settings are explained below. Here it is with Night Light mode on...

H2O 500 cordless humidifier with night light on

How do I change between modes?

The first short press puts you in Continuous Mode with the mist running constantly. This mode gives you maximum output but the shortest run-time.

The second short press changes to Intermittent Mode. In this mode mist is produced for 2 seconds, then off for 2 seconds, on repeat. This mode has the longest run time. 

The third short press turns off the mist.

The first long press turns on Night Light mode. A gentle ambient light glows from the top and bottom. 

You can combine the light with both mist modes, or run mist only, no light. You can also turn off the mist and just use it as a night light only.

The second long press turns off Night Light mode. 


Use your humidifier in Intermittent Mode unless the air is very dry. In dry conditions all the mist produced will be absorbed by your plant and the surrounding air, however if you run in Continuous Mode when the air is already moist, excess moisture may pool in the unit or on the shelves. Continuous Mode is best when humidity drops below 60%, otherwise use Intermittent Mode. To check humidity, get yourself a mini plant hygrometer.

This model does NOT have an auto-shut off when the water runs out, so each time you turn it on, lift the top off the base to check the water level is full. This model also makes it easier to check the water level as the bottom of the reservoir is visible at the base, without taking the top off.

H2O 500 Cordless Humidifier changing wick 


These units are super easy to clean. The smooth, round sides eliminate those nooks and crannies so many humidifiers have, making wiping it down and keeping it clean a breeze.

Water and a soft cloth should be enough to keep it clean, but you can also use a dash of white vinegar mixed with water if needed. Avoid using chemicals. When cleaning, avoid water getting on or in the top where the electronics, USB plug and settings buttons are or it may break your unit and cause it not to function any longer. 


How long does it take to charge?

The first charge should be a continuous 2 hours minimum, as mentioned in the set-up directions above. Run-times are approximate as they depend on a number of factors (such as charge left, amount of water in the reservoir, relative humidity in the air, and air temperature).

You can rapid charge anytime, as the rechargeable batteries are lithium-ion so they don't retain a memory, however to extend the life of rechargeable batteries, it's still recommended to fully discharge and fully charge each time.

If you put your humidifier in to storage, rechargeable batteries should be fully charged and discharged about once a season / 4 times a year (every 3 months) to extend their lifetime.

Why am I only getting wee wisps of mist?

If you've charged your humidifier, the filter wick is wet top to bottom, but all you're getting it wee wisps of mist or not much of anything, your choice of power brick could be under-powered. With such long run-times and big capacity batteries, these little guys love higher-voltage chargers. Or just plug the USB directly in to your laptop.  


Where can I buy the H2O Smart Humidifier?

From Love That Leaf, that's me! Find them in the plant humidifiers category here while stocks last.

Warning: Dumb things not to do

Always remove the top and put it aside before refilling. Don't submerge the humidifier in water for any reason. Don't pour water over the humidifier. Add water in to the base only, directly in to the water reservoir inside. It's extra important to avoid the top getting wet as that's where the electronics are.

When cleaning, a damp cloth is all that's needed. The unit should not be submerged, washed in running water, or soaked in water. Water and electricity never mix. When refilling, always unplug the unit first. Never use the unit with wet hands. Dry your hands first. Avoid touching the buttons, cord or plug with wet hands.

Take care to put the USB plug in correctly, and never force it. Mini USB's are small, so you can damage them or the plug if you're not careful. Force is never required. The plug will easily slot in if you have it in the correct position.  

This is a water-only humidifier. Don't run the unit with perfume, essential oil, or anything other than water in the reservoir. It will cause residue to build up over time in areas you can't clean, eventually blocking the filter, and potentially breaking or damaging the unit.

This is not a toy. Use by children should be closely supervised by an adult. It is intended for home, domestic, indoor use, not for commercial or business use.

Use or treatment of the unit other than directed may damage or break it, and will void the warranty. Wear and tear, misuse or user error is not covered by the warranty. The 6 month warranty covers manufacturing faults or defects only. If anything should go wrong, contact the retailer first. When purchased in New Zealand, the Consumer Guarantees Act applies. 

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