Home/Samsung Galaxy/Power Banks/12,000mAh Battery Case, Black (Galaxy S26 Ultra)
There are several 12,000mAh battery cases for the Galaxy S26 Ultra on Amazon that look almost exactly alike, none of them with a clear brand. This is one of them. It promises the same thing as the rest, roughly double the battery life built into the case, and it costs more than the others while scoring lower.
That’s a hard combination to recommend.
Reviewed by the Tiny Tech Box team
Version reviewed: 12,000mAh Battery Case for Samsung Galaxy S26 Ultra, Black · ASIN B0CCRMF679 · Amazon US listing · no manufacturer name is printed; near-identical to other 12,000mAh S26 Ultra battery cases.
One-sentence verdict: The same battery-case compromise as the others, with a lower 3.6-star rating and a higher price; a power bank is the better answer, and if you’re set on a case, the cheaper near-identical versions are no worse.
The bulk in the lower half is the battery; four LEDs show the case’s charge level.
Image source: Amazon.com
| Best for | Galaxy S26 Ultra owners set on a battery case who cannot find one of the cheaper equivalents in stock. |
| Not ideal for | Anyone deciding between this and a power bank, and anyone comparing it to the cheaper near-identical cases. |
| Current price | $42.60 on Amazon |
| Price checked | Oct 31, 2026 |
| Version reviewed | 12,000mAh Battery Case, Black · Galaxy S26 Ultra (6.9-inch) · ASIN B0CCRMF679 · Amazon US |
It’s a two-piece hard case with the battery packed into a thick lower section, and like every case in this category it turns the S26 Ultra into a heavy, chunky phone that sits noticeably differently in your pocket and in your hand from the moment you clip it in. The build is to an unbranded standard. You get raised bezels, a charging port on the bottom and four LEDs.
Clip the phone in, press the button on the back to start charging, and watch the LEDs count down. The case recharges through its own port, and wireless pass-through works if you’d rather just drop the whole thing on a pad.
The capacity is real. It roughly doubles how long the phone lasts.
Getting that power into the phone is slow, though, and it runs warm through the internal connector, with no fast charging at all. Then there’s the rating. At 3.6 stars, the lowest of the S26 Ultra battery cases we’ve looked at, it suggests more owners than usual have run into problems with the fit, the port or how long it lasts.
Works with:
Not compatible:
There’s no brand, no warranty and a below-average rating, and the built-in battery will degrade over time with no way to replace just the cell, so when it tires, the whole case goes in the bin. On ownership record, it’s the weakest of the battery cases we’ve looked at.
At $42.60, it’s the most expensive of the near-identical 12,000mAh S26 Ultra battery cases, and the lowest rated. A CUKTECH 45W 20,000mAh power bank costs less, holds more and charges far faster.
We can’t make a value argument for it. None. If you want a battery case, one of the cheaper look-alikes is no worse. And if you’re open to a power bank, that’s the better product for less money.
3.6 ★ from 488 Amazon ratings · price checked Oct 31, 2026
Price and availability may change after the date shown.
| Product | Best for | Key advantage | Main drawback | Price |
|---|---|---|---|---|
| 12,000mAh Battery Case, Black (S26 Ultra) (this case) | Extra battery built into the case | Large capacity; always attached; wireless pass-through | Lowest rating and highest price of the S26 Ultra battery cases; unbranded; no warranty | $42.60 |
| 12,000mAh Battery Case with Wireless (S26 Ultra) | The same idea, better rated and cheaper | Higher 3.9-star rating; a few dollars less | Same battery-case downsides | $38.90 |
| CUKTECH 45W 20,000mAh Power Bank | More capacity, far faster, replaceable, cheaper | 20,000mAh; 45W; works with any device | You carry it | $29.99 |
If you really want a battery case for the S26 Ultra, get the near-identical version with the higher rating and the lower price instead of this one. If you’d consider a power bank, a CUKTECH 45W beats every battery case we cover on capacity, speed and price.
It does deliver the capacity it claims, and it roughly doubles the Galaxy S26 Ultra’s battery life with the power always attached. That’s the whole case for buying it.
Everything else points the other way. It’s the priciest and lowest-rated of these near-identical cases, it makes a big phone heavy all day, it charges slowly and runs warm, and it has no brand and no warranty behind it. If you want a battery case, buy a cheaper one. If you want the best fix for short battery life, buy a power bank.
| Category | Score |
|---|---|
| Design — the battery is the bulk; a heavy, thick phone all day | 2.5 / 5 |
| Value — the most expensive and lowest-rated of the S26 Ultra battery cases; a power bank costs less and does more | 2.5 / 5 |
| Performance — real capacity, but slow, warm charging and no fast-charge support | 3 / 5 |
| Build & Durability — unbranded, no warranty, a 3.6-star record, and a case battery that ages with every cycle | 2.5 / 5 |
| Compatibility & Ease of Use — fits one model, wireless pass-through works; the daily weight is the friction | 3 / 5 |
| Overall | 2.7 / 5 · Average |
The overall score is the average of the five aspects above. How we score.
| Type | Rechargeable battery case |
| Compatible model | Samsung Galaxy S26 Ultra (6.9-inch) only |
| Case capacity | 12,000mAh (listing claims about 150% extra runtime) |
| Charging the phone | Slow, through the case’s internal connector; generates heat |
| Wireless charging | Pass-through supported |
| Indicators | Four LEDs; auto-stop at full |
| Protection | Raised bezels; not waterproof |
| Weight | N/A: much heavier than a normal case |
| Warranty | N/A |
| ASIN | B0CCRMF679 |
| Manufacturer | Not stated on the listing |
“N/A” means the value is not listed on the Amazon listing. There is no manufacturer product page to cross-check.
Functionally, it isn’t. It’s the same design as the near-identical cases from other sellers, just with a lower 3.6-star rating and a higher price.
No. It’s cut for the 6.9-inch S26 Ultra only.
Yes, as pass-through. Put the phone and case on a wireless pad and both charge.
A power bank. Similar or bigger capacity costs less, charges much faster, works with any device and can be replaced without replacing your case.
None is listed, and the case is unbranded. If it fails, your only recourse is an Amazon return.
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Prices and availability are accurate as of the date shown and are subject to change. The price and availability displayed on Amazon at the time of purchase will apply.
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Sources: Amazon product listing (ASIN B0CCRMF679), read Aug 28, 2026 · the listing’s own specifications and buyer reviews · comparison with the near-identical 12,000mAh S26 Ultra battery cases (B0GCBLXZT6, B0C5R6WJKS). There is no manufacturer product page to cross-check; treat the listing’s figures accordingly.
Disclosure: As an Amazon Associate, Tiny Tech Box earns from qualifying purchases. Recommendations are based on our own research and scoring, described in full on our How We Score page.