Home/Samsung Galaxy/Power Banks/12,000mAh Battery Case, Black (Galaxy S26 Ultra)
This is another of the near-identical 12,000mAh battery cases for the Galaxy S26 Ultra sold under no clear brand. It makes the same promise as the others — double the battery life, built into the case — and carries a lower rating than most of them, at a higher price.
Reviewed by the Tiny Tech Box team · Not a hands-on test — written from the manufacturer’s published specs, the live Amazon US listing and owner reviews · Last checked August 28, 2026
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 insist 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 | August 28, 2026 |
| Version reviewed | 12,000mAh Battery Case, Black · Galaxy S26 Ultra (6.9-inch) · ASIN B0CCRMF679 · Amazon US |
A two-piece hard case with the battery in a thick lower section. It behaves like the rest of its category: it turns the S26 Ultra into a heavy, chunky phone, changes how it pockets, and is built to an unbranded standard. Raised bezels, a charging port on the bottom, four LEDs.
Clip the phone in, press the back button to start charging, watch the LEDs. Recharge the case through its own port; wireless pass-through works on a pad.
The capacity is real and it roughly doubles the phone’s endurance, but it charges slowly and warmly through the internal connector, with no fast-charge support. The 3.6-star average — the lowest of the S26 Ultra battery cases here — suggests more owners than usual hit fit, port or longevity problems.
Works with:
Not compatible:
No brand, no warranty, a below-average rating, and the built-in battery degrades over time with no way to replace just the cell. This is the weakest of the battery cases we have looked at on the ownership record.
At $42.60 on Amazon (checked August 28, 2026), this is 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.
There is no value argument here. If you want a battery case, one of the cheaper equivalents is no worse. If you are open to a power bank, that is the better product for less money. Check the current price before you buy.
3.6 ★ from 488 Amazon ratings · price & rating checked August 28, 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 | ~$39 |
| CUKTECH 45W 20,000mAh Power Bank | More capacity, far faster, replaceable, cheaper | 20,000mAh; 45W; works with any device | You carry it | ~$30 |
If you want a battery case for the S26 Ultra, the near-identical version with a higher rating and a lower price is the one to get, not this one. If you are open to a power bank, a CUKTECH 45W beats every battery case here on capacity, speed and price. Prices are Amazon figures from August 28, 2026.
This battery case delivers the capacity it claims and roughly doubles the Galaxy S26 Ultra’s runtime, with the power always attached. That is the entire case for it.
Everything else points away. It is the priciest and lowest-rated of the near-identical 12,000mAh S26 Ultra battery cases, it makes a big phone heavy all day, it charges slowly and warmly, and it is unbranded with no warranty. If you want a battery case, buy a cheaper one. If you want the best answer to 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 |
Each aspect is scored from 1 to 5. The overall score is the average of the five, shown to one decimal place. Verdict bands: 4.5–5.0 Hell Yeah, 3.5–4.4 Would Buy, 2.5–3.4 Average, 1.0–2.4 Trash.
| Type | Rechargeable battery case |
| Compatible model | Samsung Galaxy S26 Ultra (6.9-inch) — this model 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.
It is not, functionally. It is the same design as the near-identical cases from other sellers, but with a lower 3.6-star rating and a higher price.
No. It is cut for the S26 Ultra (6.9-inch) only.
Yes, as pass-through — place the phone-and-case on a wireless pad to charge both.
A power bank. A similar or larger capacity costs less, charges much faster, works with any device, and can be replaced on its own.
None is listed and the case is unbranded. Your recourse if it fails is an Amazon return.
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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.