Mayhem PowerRush 4000mAh Power Bank


Was £9.99

Now £4.99 inc VAT

Half Price

Price display Inc VAT : change
Product Code: 1612050002 | Barcode: 5060003297222
Product Code: 1612050006 | Barcode: 5060003297284

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Was £9.99

Now £4.99 inc VAT

Delivery options available:
  • Free home delivery over £40
  • Free Click & Collect
  • Standard delivery up to 3 working days
  • Next day delivery
  • Named day delivery
  • Saturday delivery


Charge your device anywhere with the Mayhem PowerRush 4000mAh Power Bank, perfect for when you don't have access to a power source.

Put this brilliant power bank in your handbag, pocket or backpack for charging on the go, whether you are attending festivals, days out or camping.

It features a convenient charge level indicator so you can plan ahead of time and see how much battery is left.

. 4000 mAh Power Bank with lanyard strap
. Charging cable for power bank included
. Textured finish
. Dimension: 95 x 63 x 20mm


Enjoy FREE Next Day courier delivery on all orders over £40 (inc VAT)

For orders under £40, delivery is just…

Standard £3.50

Next Working Day £4.95

Store Delivery FREE

Next Working Day £4.95

Store Delivery FREE

Named Day £6.95

Saturday Delivery £8.95

Delivery is FREE to a Ryman Store of your choice for delivery within 7 working days.

The Extras You Need to Know…

For Next Working Day Delivery orders must be received by 6pm to guarantee next day delivery.

Some of our products are sent directly from our suppliers, and can take a little longer to arrive. Look out for the van symbol next to the product image and the delivery advisory in the product description to easily identify these products.

If you’re outside of England, Scotland and Wales, your delivery prices may change a little. See our complete Delivery Policy here for more information.

If you still have questions, our Customer Services Team would love to hear from you. Just call 0333 103 0901.


Think you might change your mind?

Don’t worry! If you change your mind for any reason or in the rare event there is a fault with your product we are more than happy to offer you a full refund*.

Simply ensure the goods are returned within 28 days of delivery and in a re-saleable condition and we’ll take care of the rest.

*For our full returns policies please see our General Policy.

If you still have questions, our Customer Services Team will be happy to help. Just call them on 0333 103 0901

Rely on Ryman

With over 200 stores nationwide and over 120 years of retailing experience you can Rely on Ryman for all your home, office and convenience needs.

You as a customer is our focus and personally delivering the best service is our goal, aiming to offer an unrivalled shopping experience both on-line and instore. Don’t worry if you need to change or cancel your order, here at Ryman we have a speedy returns process at just 72 hours of receipt!

We pride ourselves on our continued commitment to quality, value, reliability and service. With our dedicated Customer Service team available from 8am through to 8pm Monday to Friday and 9am to 5pm over the weekend you can be confident we are here for you.

Such high regard for customer care and specialist knowledge have allowed Ryman to build and retain a very loyal and happy customer base, so whether you’re a new customer or you’ve come back to see us you can Rely on Ryman to welcome you on board.


Need some help?

Our customer services team would love to hear from you if you need help with some product advice or have any other query, please call 0333 103 0901. Overseas please call 00441270442900 (9am to 7pm Monday to Friday, 9am to 5pm Saturdays)

For high street store related queries please contact your nearest store. Please use our store finder for contact details or call our branch liaison team on 01270 530650 (8am to 6.30pm Monday to Friday)

For Business Account enquiries please email [email protected] or call 01270 530635 (8:30am to 5:00pm Monday to Friday, 9am to 6pm Saturdays and 10am to 4pm on Sundays)

Ratings & Reviews


1 Review

5.0 / 5 Quality

5.0 / 5 Value

Rating snapshot
  • 5 / 5Quality

    5 / 5Value

    22 September 2019

    Cheap if a tad underpowered

    This is certainly amazing value for money. It will charge itself up in around 4 hours. And it's so tiny you can pop it in your jacket pocket connected to your phone with the little USB cable that comes with it, and it will keep your phone going all day long. Now I've played round a *lot* with the settings on my Samsung A20. It now runs bullet fast, but it will discharge its battery in about three hours. So if your own phone normally lasts 8 hours, then this portable powerbank will at least double - maybe even triple - that. I want a powerbank to go camping with so I need around 3 days worth of power. But most people will just want something they can charge up overnight in a hotel room, then will run their phone all day until they return late evening. And I reckon this should do that perfectly. Especially if you put your phone on battery savings mode, which - unless you need loads of apps running - is fine. You can set it up to still use Google Maps, Whatsapp, a streaming music service, plus your calendar and basic phone and SMS functions. So all in all, you get a very good deal for a tiny outlay. And just think how much it could cost you in lost business to miss an important email or text because your phone battery has died!