Acquiring a refurbished iPhone 12 allows you to enjoy a high-performance smartphone while saving money. However, the battery remains the key element to ensure sufficient autonomy and comfortable use. Even if the device works correctly, a too-worn battery can limit the experience.
Opt for a recognized refurbished iPhone reseller
When you buy an iPhone 12 from Certideal, for example, the battery is one of the most controlled elements before being put on sale. Each device undergoes a complete diagnosis to measure the maximum battery capacity as well as the number of recharge cycles already performed. This data helps determine the actual state of the battery and ensures that it offers sufficient autonomy for daily use.
Apple considers a battery technically acceptable if its capacity is at least 80%, but to fully enjoy the device and avoid degraded autonomy, it is recommended to aim for a capacity between 85 and 90%. A battery in this range ensures that the smartphone will easily last a full day, even during intensive uses like browsing, video streaming, or gaming.
Serious resellers like Certideal guarantee this verification and, in some cases, replace batteries that do not meet standards, ensuring that the buyer receives a ready-to-use phone with optimal autonomy. In addition to capacity, the number of recharge cycles helps estimate the remaining longevity of the battery, as the higher this number, the more likely the battery will lose autonomy over time.
Ideal capacity and usage thresholds
Before finalizing a purchase, knowing the capacity thresholds allows you to choose a reliable and durable device. Here are the benchmarks to keep in mind:
- 85% and above: this capacity indicates that the battery is in very good condition. You can use your iPhone 12 in a standard or intensive way without worrying about insufficient autonomy. Performance remains smooth, even for demanding tasks.
- 80 to 85%: the battery remains usable, but there may be a slight drop in autonomy in the case of demanding activities like prolonged video streaming or gaming. The device remains functional, but you will need to monitor energy consumption if you use it intensively.
- Below 80%: Apple recommends a replacement to maintain correct performance. With a lower capacity, autonomy and fluidity may be compromised, and frequent recharges become inevitable.
These benchmarks not only help identify a reliable refurbished iPhone 12 but also predict how long the battery will remain efficient before needing a replacement.
How to check the capacity on your iPhone?
iOS offers a built-in function to check the battery in a few simple steps. This process is quick and essential before any purchase:
- Go to Settings > Battery.
- Tap on Battery Health & Charging.
- Check the percentage displayed under Maximum Capacity.
This information indicates the current performance of the battery compared to its initial capacity. For intensive users, it is recommended to choose a phone with a percentage close to 90% to ensure comfortable autonomy from the first use.
It is also advisable to ask the seller for the number of recharge cycles already performed and, if possible, to check if the battery has been replaced recently. A new or lightly used battery ensures better durability and limits the risk of rapid degradation.
Estimated autonomy according to battery percentage
To help orient yourself, the table below presents the approximate autonomy of a refurbished iPhone 12 according to the capacity percentage and type of use:
| Battery Capacity | Light use (calls, messages) | Medium use (browsing, social networks) | Intensive use (video, games) |
| 90-100% | 1 and a half days | 1 full day | 8 to 9 hours |
| 85-90% | 1 full day | 7 to 8 hours | 6 to 7 hours |
| 80-85% | 7 to 8 hours | 6 to 7 hours | 5 to 6 hours |
| < 80% | 6 to 7 hours | 5 to 6 hours | 4 to 5 hours |
This table allows you to concretely visualize the remaining autonomy according to your use. Occasional users can settle for 80 to 85%, but for those who use their iPhone for demanding applications, video streaming, or games, it is preferable to aim for a device with at least 85% capacity.
