Fresh balls. Every match.

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.