One of the pending issues for mobile phone manufacturers continues to be battery capacity and life. Fast charging has been a great advance, but it is still not enough. The great objective is to be able to have a battery that lasts longer and that does not have to be recharged daily. And we may have the solution before us: Energizer Hard Case P28K, the mobile phone with the most battery in the world.
This is one of the great novelties that the 2024 edition of the MWC (Mobile World Congress), which was held these days in the Spanish city of Barcelona. A joint proposal from the French manufacturer Future Telecom and the famous battery brand Energizer. We tell you everything in more detail in the following paragraphs:
It is not the first time that this brand surprises us with a high-capacity battery. Already in 2019 it presented a model with no less than 18.000 mAh, the Energizer Power Max P18K Pop. Almost five years have passed since then and now Energizer is upping the ante.
A 28.000 mAh battery!
Accustomed to seeing high-end phones that boast batteries with a capacity of 5.000 mAh, what the Energizer Had Case P28K proposes is simply spectacular: a 28.000 mAh battery that has already been described by some specialized media as "monstrous." That's right.
Always according to the data provided by the brand itself, this means that your smartphone It can work for a whole week without having to recharge. That is in the case of normal mobile use. If we had it at rest, unused, the duration could be extended to three months. Awesome.
As for the charging speed, it would be 90 minutes for a full recharge, with a charging power of 33 W. Honestly, this figure is a little short considering the battery capacity.
Although the advantages of having such a battery are evident, it is also fair to point out some small points against it. The most important of all is that strength has to be sacrificed for a thin and light design. In fact, The weight of this model is 570 grams, while its thickness is 27,8 mm. In other words: it is not the most suitable mobile phone to carry comfortably in your pocket.
That is the price to pay for having the cell phone with the most battery in the world. You can not have everything.
A very resistant mobile in every sense

The dimensions and weight of the Energizer Hard Case P28K, along with other features that we will discuss below, make this model the best example of what a rugged mobile phone (a high-resistance device capable of operating in extreme conditions) should be. . In this sense it is necessary to mention the IP69 certification, the degree of Maximum protection against the penetration of dust and water.
As for the case materials, they are not yet known, but the fact that the name of the phone includes the words hard case (box or hard case), already gives us an important clue.
The rest of the technical specifications are not so spectacular, although they are worth commenting on. At least those that have been leaked to the press, since The launch of this model will not occur until after the summer.
For example, it is known that the Energizer Hard Case P28K will have a 6,78-inch IPS screen, 8 GB of RAM and a large MediaTek Helio G99 processor (the same chip found in the Samsung Galaxy A15). It will also have 4G connectivity. These are quite interesting aspects, although everything is obviously overshadowed by that striking figure for battery capacity.
Energizer Hard Case P28K – Data sheet

In the absence of knowing more specific details about this model, these are the specifications of the Energizer Hard Case P28K that are known so far:
- DIMENSIONS: Not specified, only the information regarding thickness (27,8 mm).
- WEIGHT: 570 grams
- SCREEN: 6,78-inch IPS LCD, Full HD (1080 x 2460 pixels), 60 Hz refresh rate.
- PROCESSOR: MediaTek Helio G99 8-core.
- RAM MEMORY: 8 GB.
- STORAGE: 256 GB.
- FRONT CAMERA: 16 MP.
- REAR CAMERA:
- Main: 60 MP.
- Wide angle: 20 MP.
- Depth: 2 MP.
- BATTERY: 28.000 mAh, with 33W fast charging (non-removable).
- CONNECTIVITY: WiFi 802.11 a/b/g/n/ac, dual band; Bluetooth 5.1, A2DP, LE; GPS positioning, USB type C 2.0
- OPERATING SYSTEM: Android 14.
- OTHER FEATURES: Accelerometer, proximity sensor, light sensor and compass.
Sale price and availability
The Energizer Hard Case P28K, a rugged, heavy smartphone with a gigantic battery, will go on sale in the main European markets at the end of 2024. According to the plans that the manufacturer is considering, it could be in the month of October.
What Avenir Telecom has announced is the launch price, which will be 249,99 Euros, not bad considering the unusual features of this mobile phone.