Pressurebox Pro

Up to 8 times longer than if they just sit in the tube they came in. How close you get to that depends on the condition of the balls, how hard you hit and how often you play.

For reference: a tennis ball should bounce 135-147 cm when dropped from 254 cm - below that, it counts as flat. Pressurebox extends the time your balls stay within that range. It doesn't stop the felt from wearing.

A padel ball has around 10-12 psi inside, a tennis ball 12-14 psi. The rubber is porous, so air slowly leaks out - and every shot squeezes a little more out. That's why a tube of balls feels flat long before the felt is worn.

Pressurebox reverses the process. We keep a higher pressure in the container than inside the balls: around 22 psi on Normal and around 28 psi on High. When the pressure outside is higher than inside, the air moves the other way - back into the balls. A built-in sensor measures the pressure and starts the compressor when it drops, so the level stays constant without you having to do anything.

Put them in straight after playing and leave them there until next time. The first time takes longest, because the air has to work its way all the way into the balls - allow a day before you notice a difference. After that it's quicker, because the balls start from a higher pressure.

There's no need to take them out in between. The more time they spend under pressure, the better they keep.

If the balls still have some pressure left, yes - those are the ones you'll get the most out of. If they're completely flat, they can't be brought back.

The same goes for balls with worn-down felt or cracked rubber. We restore the pressure, not the ball itself. If in doubt, try a set that still has a few matches left in it.

The padel model holds 3 padel balls and the tennis model 4 tennis balls - the same as a standard tube.

Each container is built for its own ball size. You can put padel balls in the tennis model, but there will be space left over, and you'll get the most out of the model that matches your sport.

Up to 4 weeks on a single charge with normal use. It charges via USB-C, and the four lights show how much charge is left.

Use the original cable - not all USB-C cables make a proper connection. Charge it until the lights stop flashing, and unplug the cable before use: the compressor doesn't run while it's charging.

You have 30 days from the day you receive it to try it with your own balls. If you change your mind, email info@balcour.co with your order number and we'll send you instructions and a link to our returns portal. The item must be returned clean and in its original packaging, and you pay for the return shipping. We refund to your original payment method no later than 14 days after we receive it.

If the product is faulty, it's a warranty claim, not a return. You're covered by a 2-year warranty, and we cover reasonable shipping costs.

We ship from our warehouse in Denmark with DHL - free to a DHL ServicePoint or parcel shop, with home delivery available at checkout. In-stock items normally ship the same day when you order before 2 pm on a working day, with expected delivery in 1-3 working days.

If a variant is on backorder, you'll see it next to the buy button, and we ship it as soon as it's back in stock. You'll get a tracking number by email as soon as your order has shipped.

Normal (green) holds around 22 psi and is what you use day to day. High (blue) holds around 28 psi and pushes air back into the balls faster - handy when you've just dug out a set that's been lying around for a while.

To switch, hold the Mode button for three seconds while the unit is on.

Yes, leave the on/off button switched on between matches. The sensor then measures the pressure itself and tops it up when it drops. That's what saves you from pumping anything by hand.

The compressor only runs in short bursts when needed - not constantly.

Switch it off first and press the pressure release button on the lid. Once the pressure is out, the lid unscrews easily.

If it's tight, hold the container against your chest using your whole palm rather than your fingertips, and twist the lid and the tube in opposite directions.

Yes, give them a wipe if you've been playing outdoors in the rain. Moisture doesn't do the balls any good, and wet felt leaves fluff on the thread and seal, which can cause a leak.

Wipe the thread and the edge of the lid now and then too - that's where most sealing problems start.

Yes, but it has to go in your hand luggage. Devices with a built-in lithium battery aren't allowed in checked baggage, and that includes Pressurebox.

Release the pressure and switch it off before you pack it. Always check your airline's own rules if you're unsure.

Preferably not for long. The cold drains the battery quickly and makes the seal stiff, so the container is more likely to leak.

If it's been somewhere cold, let it come up to room temperature for 24 hours before you charge or use it. If it's going to sit unused for a while, charge it to around three lights and give it a charge every three months.

Most of the time, the lid isn't fully closed. Screw it on properly and check that the pressure release button isn't stuck down.

If that doesn't help, take the rubber ring off the lid, wipe it and the surface underneath with a slightly damp cloth - water only - and check for cracks or flat spots. Put it back evenly in its groove. Never use alcohol or strong cleaning products, and keep the product away from running water.

Still not working? Email info@balcour.co and we'll sort it out.

Email info@balcour.co. We're open weekdays 9 am-4 pm (CET) and normally reply within 24 hours on working days.