Your festival stays charged. You get paid.

An attendee service that shares its revenue with you.

No app
No registration
Contactless payment

Festival attendees raise their smartphones to record a sunset concert, with one phone actively charging from a glowing green MAS Battery power bank.

FLEXIBLE SETUPInstallation and support scoped in your proposal.
2 NEW REVENUE LINESPower bank rentals + brand sponsorship: your share of both.
ON-SITE SUPPORTWe help your team before, during and after the event.

The problem

Dead phones ruin the experience.

When an attendee's battery dies, their festival experience changes. They stop spending, lose their friends, and leave early. You lose F&B revenue, merch sales, and social-media amplification.

Lost Connection

Attendees spend hours looking for friends instead of experiencing stages or vendors.

Lower Spend

Without digital wallets or festival apps, per-head spending drops.

Zero Amplification

No battery, no Instagram stories, no TikToks, no organic marketing for next year.

Safety Concerns

Inability to receive emergency broadcasts or contact medical staff when needed.

Why us, not the alternatives

Lockers charge phones. We charge any device, and keep your attendees happy and ‘spending’.

Most festivals still solve charging with a cable tent or a wall of lockers. Both are cost lines. MasBattery is a revenue line.

	Cable tent	Locker rental	MasBattery
Effect on your P&L	Cost line	Cost line	Revenue line
Attendee experience	Tethered to the tent	Phone locked away	Take a bank, keep moving
Ops burden on you	Cables, staff, queues	Locker keys, deposits	Self-service stations

Your brand on every station

At your festival, the brand is yours: our stations carry your logo, so attendees see your name, not ours.

You share the revenue

We share rental revenue with you, and LED ad-screen sponsorship revenue too. Two new lines, one partner.

Built for festival crowds

Why does a festival need its own charging?

Your attendees are on their feet all day, far from a socket. Stations go where your crowd gathers, and any power bank can be returned to any station on site.

No app

Nothing to download.

No registration

No accounts, no personal details.

Cashless

Contactless card, Apple Pay or Google Pay.

Running cashless wristbands? We can connect the stations to your wristband and tailor the rental to your festival.

The bottom line

Clear terms. Shared upside.

Hardware, delivery, installation and on-site support are set out in your proposal. You provide a small footprint and power access, and you share in the rental revenue.

Hardware & delivery

Stations, power banks, cables and on-site equipment, with the scope set out in your proposal.

On-site support staff

We help monitor and rebalance stations during the event, as agreed in your proposal.

Generous revenue split

A meaningful share of every rental flows directly to your organization, settled post-event.

Pricing that fits your festival

Sized to your event, not the other way around.

We've run both hourly and pass-based models. The right structure depends on your audience, your event length, and how your guest-services team wants to handle support. We walk through the options together on the call.

Hourly rental

Pay-as-you-go for casual events and shorter durations. Attendees pay only for the time they use.

Day or festival pass

Flat-fee unlimited swaps. Predictable for attendees, easy on your guest-services team.

Custom mix

Hybrid pricing, modeled around your audience. We'll work out the right structure on the call.

Logistics

Infrastructure without the headache.

Setup1
Before gates open.
Stations are delivered and connected before the event opens.
Operations2
On-site support throughout.
Support during the event helps keep charged power banks where the crowd is.
Settlement3
Report & revenue.
We share a detailed report with you and wire your revenue share after the event.

Hardware

Industrial hardware. Frictionless UX.

Tap-and-go simplicity, no app required.

Tap and Go

Card, Apple Pay, or Google Pay. A fully charged bank ejects in seconds.

No app needed

No download, no signup, no account. Attendees walk up and pay with what's already in their pocket.

MasBattery counter station with a screen and 12 power bank slots

A MasBattery station on a bar counter while a guest holds a phone to the reader

The stations

Meet the MasBattery stations.

Two formats, one service: they take the payment, hand out the battery and take it back. Pick the one that fits your space.

Compact: it sits on the bar, the counter or its own stand.

245 × 220 × 474mmstation size
12power bank slots

Ideal for

On both stations

Contactless card, Apple Pay or Google Pay
0apps to download, no registration

The power bank

Slim, cables built in, ready to go.

The battery your guest carries fits in one hand and brings its own cables. Nothing to bring: they use it while they carry on and return it at any station.

2built-in cables: USB‑C and Lightning
20Wcharging power, at most
Up to 1.5 charges, depending on the phone
CEcertified, and UN38.3 compliant for transport

Charges more than phones

Phone
Earbuds
Tablet
Handheld console

and any device with USB‑C or Lightning.

Back of the MasBattery power bank with its two built-in cables, Lightning and USB‑C

LightningUSB‑C Front of the MasBattery power bank with the logo and the return button

Step by step

How to rent a power bank.

A hand holding a phone with a dead screen in a hotel lobby

Looking for a charger?
Never run out of battery.
Phone at 2%? There's a charged power bank a few steps away.
Look, there's a station
The station is where you already are.
No hunting for sockets or cables, no stress: the MasBattery station is right there in the venue.
You tap your card
Pay with your phone or card.
Tap a contactless card, Apple Pay or Google Pay on the reader. No app, no registration.
Out comes your battery
A charged power bank in seconds.
The station releases a power bank ready to use.
Two cables, nothing to bring
Two built-in cables: USB‑C and Lightning.
One for USB‑C phones, one for Lightning iPhones. You don't need to carry anything.
You carry on
It charges while you carry on.
Up to 1.5 charges depending on the phone, without being stuck next to a socket.
Drop it back, done
Return it at any MasBattery station.
Push it into an empty slot. You only pay for the time you used.

Built where festivals live

Based in Valencia, Spain.

Designed, deployed, and supported from Spain. WhatsApp support in español and english. Real people on call when it counts.

Local Spanish company
On-site response when it counts
WhatsApp-first ops
Valencia HQ

Ready before you sign

Festival-grade compliance, already documented.

The certifications your operations and legal teams actually need.

CE Declaration of Conformity
UN38.3 transport certified
RII-AEE registered (Spain)
Liability coverage per station

Full compliance binder available for your operations and legal team on request.

FAQ

Questions we get most.

Why not just buy the hardware and run this ourselves?

You could. The hardware is the easy part. The work around it (Spanish import compliance, payment pre-authorisation, bilingual on-site support, deployment logistics, sponsor sales, refunds and bank reconciliation) is where most organizers want help. How that work is shared, and how the revenue is split, is set out in each proposal.

What if it rains?

Placement is something we work through with your production team in detail during the pre-event walkthrough. Stations sit under existing covered structures (entrances, stage wings, food courts) so they stay out of direct weather. The placement plan is agreed together before deployment, with the conditions and site map your team knows best in mind.

What languages do you support on site?

Our on-site team operates in español and english. WhatsApp support runs in both languages throughout the event.

Are the batteries Apple-certified?

Our stations and banks are CE-certified, UN38.3-compliant for transport, and RII-AEE registered in Spain: the certifications that operations and insurance teams actually need. Apple's MFi program is a separate consumer-electronics standard; we're on the roadmap to add MFi-spec cells for Tier-1 deployments in 2027.

How long does install take?

We arrive ahead of gates, deliver and connect every station before the event opens, and lead a quick on-site walkthrough with your production team. Typical installs are completed in a single day on site.

What happens if a festival attendee loses a battery?

If an attendee loses a battery, the attendee pays for it, and your team never has to worry about it.

Other venues

Stations for every kind of venue.

For hotelsPower bank rental for hotels

For theme parksPower bank rental for theme parks

For bars and clubsPower bank rental for bars and clubs

For casinos and gaming venuesPower bank rental for casinos

For festival-goersYour phone, or any device, charged.

What happens next

01
We reply within one working day.
02
You get a tailored proposal, with installation, maintenance and support defined.
03
We install the stations, typically in a single day.

For venues & operators

Let's talk about your venue.

Tell us about your venue and what you need. We'll come back within one working day with a tailored plan.

Message us on WhatsApp

Email us → [email protected]

Replies within one working day. Based in Valencia, Spain.