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The biggest battery in the set and the cheapest per hour. It is also the only listing whose capacity can be checked from first principles: it states 11.1V and 9,000mAh, and 11.1 × 9 = 99.9Wh. It has four 12V DC outputs, which covers a hub and a fibre box with room to spare, plus USB-A and USB-C for a phone.
The catch: the listing gives the 12V outputs as "9-12.6V". That is the battery's own voltage passed straight through, so it falls as the battery drains.
What we have recorded
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| Brand | Not recorded yet |
|---|---|
| Model | Not recorded yet |
| Category | Tech & Gadgets |
| Rated power | Not recorded yet |
| Running cost (estimate) | Not recorded yet |
| Warranty | Not recorded yet |
| Consumables and parts | Not recorded yet |
| Expected lifespan | No evidence recorded |
Guides that cover it
- Best router battery backup last checked 28 Oct 2026
Look Into researches products from published sources: makers’ pages, retailer listings and regulators. We have not handled or tested these products, and a blank field means we have not recorded that figure yet, not that the product lacks the feature. Awards are Look Into editorial picks, not Amazon or third-party awards. As an Amazon Associate, Look Into earns from qualifying purchases; commission never decides a ranking. How we check · How we make money