
Last updated: 29 September 2026
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The gomi Power Bank is a 10,000mAh recycled power bank from a small design studio in Brighton. Its case is hand-marbled from plastic bags, bubble wrap and food packaging that UK councils will not recycle, so no two look the same. The cells inside are second-life lithium-ion batteries taken out of e-bikes. The classic marbled colourways cost £79 and the translucent ones £59. gomi says one charge fills most phones two to three times, and it repairs the power bank for life: free for two years, then capped at £20 a repair. Prices come from Buy Me Once and gomi's own shop, checked on 29 September 2026.
gomi is a design studio on Gloucester Street, in Brighton's North Laine. It started out making Bluetooth speakers, and the power bank uses the same two materials: plastic waste that cannot go in the recycling, and batteries rescued from scrapped e-bikes.
The case starts as flexible plastic, the kind that goes in the general waste bin rather than the recycling. gomi melts it down and marbles it by hand, so every case comes out with its own pattern. The one you receive will be the same colourway as the photograph, but not the same swirl.
The power comes from 18650 lithium-ion cells taken out of retired e-bike battery packs. According to gomi's materials page, the packs are often scrapped because repairing them costs more than buying new, even though most of the cells inside are healthy. The studio tests each cell on its own diagnostic rack and reuses the good ones. Damaged cells go off for recycling.
gomi also says the power bank produces over 50% fewer CO2 emissions than comparable chargers. That is the maker's own figure.
In the hand, it is roughly the size of a pack of playing cards, a little thicker. It weighs about the same as a 250g block of butter.
| Detail | Figure |
|---|---|
| Capacity | 10,000mAh, rated at 37Wh |
| Ports | USB-C in and out, USB-A out, both 18W |
| Devices at once | Two |
| Recharging | USB-C, under four hours from an 18W charger |
| Phone charges | 2.3 for an iPhone 16, 1.6 for a Galaxy S23, 1.2 for an iPad mini 5 |
| Size | 9.5 x 6.2 x 2.5cm |
| Weight | 247g |
| Case | 100% plastic waste, hand-marbled |
| Cells | Second-life lithium-ion, from e-bikes |
| Warranty | Two years, then repairs capped at £20 |
| Price | £79 classic, £59 translucent |
The phone figures come from gomi's own charging chart, so a bigger phone battery gets fewer full charges.
Every lithium-ion battery holds less charge as it ages. gomi builds this recycled power bank so the cells can be swapped out when that happens, rather than the whole thing being replaced.
For the first two years, any repair under warranty is free. After that, gomi's repair policy caps a standard UK repair at £20. That price includes replacing worn-out cells.
The warranty also passes to a second owner, as long as they can show the original proof of purchase. So if you are giving it as a present, put the gift receipt in with it.
There are two versions, and they differ in price, looks and where they are put together.
The classic colourways cost £79 and are handmade in Brighton. Buy Me Once stocks five of them: Avalanche, Panther, Pearl, Espresso and Ultraviolet. gomi's own shop lists more, including Ocean, Rose Plant and Strawberries and Cream.
The translucent colourways cost £59. Each has a single translucent colour on the front and a white back. gomi says the capacity and the ports are the same, but these are assembled overseas. Buy Me Once has Nettle and Alpine, and gomi sells four more.
If the Brighton-made part matters to you, the extra £20 buys it. If you want the same battery and the same repair promise for less, the translucent one does the job.
See every colourway at Buy Me Once
Buy Me Once sells all seven colourways listed above, with free UK delivery on orders over £75 and a 30-day return window. The £79 classic versions clear that delivery line on their own, while the £59 translucent ones do not.
gomi also sells direct from its own shop, at the same prices, with free delivery and 30-day returns. Buy there if you want a colourway Buy Me Once does not carry.
At 37Wh, the gomi recycled power bank sits well under the 100Wh limit for flying without airline approval. The Civil Aviation Authority's packing guidance says power banks go in your hand luggage, never the hold. It also limits you to two per person and says they must never be recharged on board. Some airlines add their own rules, so check yours before you fly.
The 18W ceiling. Both ports top out at 18W. That is fine for a phone or earbuds, but it will not keep most laptops going. For comparison, the Belkin UltraCharge Pro 10K is the same capacity and pushes 60W over USB-C.
Cable only. There is no wireless charging pad and no magnets, so it will not snap onto the back of an iPhone.
The pattern lottery. Because each case is marbled by hand, you pick the colourway, not the exact pattern.
It suits anyone who carries a power bank every day and wants one they can have repaired rather than replaced. It also works as a gift for someone who cares where their things come from, because the case and the cells were both headed for landfill.
For more ideas along the same lines, our carbon-conscious gift guide collects the rest. And if you like the look, gomi's speaker collaboration with Paul Smith uses the same marbling on a bigger scale: see the gomi x Paul Smith speaker.
£79 for the classic marbled colourways and £59 for the translucent ones, at both Buy Me Once and gomi's own shop. Prices checked on 29 September 2026.
gomi's own chart gives 2.3 full charges for an iPhone 16 and 1.6 for a Samsung Galaxy S23. It also manages 1.2 charges of an iPad mini 5.
Yes. The case is 100% flexible plastic waste, such as bags, bubble wrap and food packaging, which UK councils class as non-recyclable. gomi melts it and marbles it by hand.
The classic colourways are handmade at gomi's studio in Brighton. The cheaper translucent versions are assembled overseas.
Within the two-year warranty, gomi repairs or replaces it for free. After that, a standard repair in the UK costs no more than £20, and that includes a battery refresh.
Yes, in your hand luggage. It is rated at 37Wh, under the 100Wh limit, but you can carry only two power banks and cannot recharge them on board.
No. It charges by cable, through one USB-C port and one USB-A port, and it can run both at once.
Prices, colourways and stock change often, so check the retailer before you buy. gomi's repair terms are set out on its own site and can change.
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