Illustrative imageSmartphone by Ulefone · EPREL no. 2500221 · Information sheet (PDF)
- Pro: 90 h battery life typical: 58 h
- Pro: Waterproof (IP68) typical: IP68
- Con: Battery built in like 78% of smartphones
- Con: Scratch resistance level 4 typical: Level 5
Compared with all smartphones
▼54% are better
●Lowest level
▼22% are better
▲Better than 26%
▲Better than 54%
▲Best level
▲Best level
▼Bottom 20%
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More about the Ulefone RugKing 4 Pro
In short: Average repairability and long battery life, but the battery is built in. Overall rating 5.6 out of 10, Rank 535 of 1,075 smartphones.
How the overall rating is calculated
How the 5.6 comes about
Eight values from EPREL, 0 to 10 points each, with fixed weights.
- Repairability5.635%+2.0
- Updates5.020%+1.0
- Replaceable battery0.010%+0.0
- Charge cycles5.010%+0.5
- Drops10.010%+1.0
- Battery life9.05%+0.5
- Water10.05%+0.5
- Scratches4.05%+0.2
Product information sheet (EU)
Supplier information from the official product information sheet under Delegated Regulation (EU) 2023/1669, EPREL number 2500221. Index scores from 1 to 5; EPREL stores spare parts, software updates and repair information as a level, and the scores shown are converted from it. Placed on the Union market from 2025-10-22.
| Parameter | Value |
|---|---|
| 1. Supplier’s name or trademark | ulefone |
| 2. Model identifier | RugKing 4 Pro |
| General product parameters | |
| 4. Device type | Smartphone |
| 5. Operating system | Android |
| 6. Energy efficiency class | B |
| 7. User-replaceable battery | No |
| 8. Battery endurance per cycle [h] | 89.80 |
| 9. Battery endurance in cycles, default settings [cycles] | 1,000about 2.5 years at one full charge a day |
| 10. Rated battery capacity [mAh] | 10,000 |
| 11. Shipped with protective cover | No |
| 12. Repeated free fall reliability: falls without defect [n] | 270 |
| 13. Falls without defect, tested in fully extended state [n] | not applicable |
| 14. Repeated free fall reliability class | A |
| 15. Ingress protection rating | IP68 |
| 16. Declared immersion depth in water, for IPx8 [m] | 2.00 |
| 17. Scratch resistance of the screen on Mohs’ hardness scale | 4 |
| 18a. Charger: required output power [W] | 18 |
| 18b. Charger: receptacle type (at the device end) | USB-C |
| Repairability information | |
| 19. Guaranteed minimum availability of security, corrective and functionality updates for the operating system (years) | 5Updates until at least 2033-10-22 |
| 20. Repairability class (based on the index) | C |
| 21. Repairability index | 3.23 out of 5 |
| 21a. Disassembly depth score (SDD) | 3.10 out of 5 |
| 21b. Fasteners type score (SF) | 2.30 out of 5 |
| 21c. Tools type score (ST) | 3.10 out of 5 |
| 21d. Spare parts score (SSP) | 5 out of 5 |
| 21e. Software updates duration score (SSU) | 1 out of 5 |
| 21f. Repair information score (SRI) | 5 out of 5 |
| 22. Web link to information on the availability of spare parts for professional repairers and end users | ulefone.com |
| 23. Web link to repair instructions for end users | ulefone.com |
| 24. Web link to indicative pre-tax prices | ulefone.com |
| Additional information | |
| 25. Minimum duration of the guarantee offered by the supplier [months] | 24 |
Buying used?
Limited suitability Repairability or the remaining years of updates fall short of our rule.
- Updates until at least 2033-10-22
- Battery built in, 1,000 cycles ≈ 2.5 years
- Spare parts until at least 2035-10-22
- EU class C: average
What to check: Ask about the battery: remaining capacity or charge cycles; below 80 % capacity a replacement is due. Check on the device when the last security update arrived and that account and network locks have been removed. Guide to buying used
Verdict by fixed rules from the manufacturer data, not paid for: how it is made.
Compare with similar devices
Higher-rated devices of the same type. Green: the best value where the devices differ.
Fact sheet
- On the market since
- 2025-10-22
- Supplied to retailers until
- 2028-10-22
- Supplier in EPREL
- ulefone
- EPREL number
- 2500221In the EPREL lookupEPREL product sheet
- Index
- 3.23 out of 5
- Name in EPREL
- RugKing 4 Pro
Frequently asked questions
Can you replace the battery of the Ulefone RugKing 4 Pro yourself?
No, according to the supplier in EPREL the battery of the Ulefone RugKing 4 Pro is not user-replaceable.
How long does the Ulefone RugKing 4 Pro get updates?
According to the supplier in EPREL, at least 5 years of operating system updates, counted from the end of sales.
How easy is the Ulefone RugKing 4 Pro to repair?
The Ulefone RugKing 4 Pro has EU repairability class C (average, index 3.23 out of 5) and an overall rating of 5.6 out of 10 from us, rank 535 of 1,075 smartphones.
How long does the battery of the Ulefone RugKing 4 Pro last?
One charge lasts 89.8 hours in the test under the regulation, and after 1,000 charge cycles the battery still has at least 80 % of its capacity, according to the supplier.
Is the Ulefone RugKing 4 Pro waterproof?
Yes, rated IP68 according to the supplier in EPREL: protected even when submerged.
Sources
Laws and regulations in their current version, linked to the source.
- EPREL, European Product Registry for Energy LabellingEuropäische Kommission · Database · 13 Oct 2026
- EPREL public data disclaimerEuropäische Kommission · Database · 13 Oct 2026
- EPREL Public API terms and conditionsEuropäische Kommission · Guidance · 3 Jun 2024
- Delegated Regulation (EU) 2023/1669 (energy labelling of smartphones and slate tablets)EUR-Lex · EU regulation · 16 Jun 2023
- German Act against Unfair Competition (UWG)Bundesministerium der Justiz · Law · 27 Sept 2026
How the used-device verdict is made
Four fixed rules from the supplier data in EPREL, as of 2 November 2026; we do not test devices, and no retailer pays for the verdict. Remaining years of updates are the end of sales (the data date if EPREL has no end date) plus the promised years of updates, minus today. “Good as a used device” means EU class A or B, at least 3 years of updates left and a replaceable battery or at least 1,200 charge cycles. “Good with a fresh battery” means class A or B, at least 3 years of updates left, built-in battery with fewer than 1,200 cycles. “Only usable for a short time” means less than 2 years of updates left. All other devices count as “Limited suitability”. Years of updates and spare parts run from the end of sales (Regulations (EU) 2023/1669 and 2023/1670); we convert charge cycles into years at one full charge a day.
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