Related Story<\/strong>\u00a0Apple Executives Are Now Reportedly Booking Extended Hotel Stays To Secure Long-Term Agreements For DRAM Supply For Up To Three Years From Samsung & SK hynix<\/h5>\n<\/div>\nThis is not a surprise outcome in hindsight. After all, the iPhone Air does have\u00a0the lowest battery capacity in the just-released iPhone 17 lineup<\/a>.<\/p>\nYet, Apple could have easily avoided all the brouhaha around the iPhone Air’s gimped battery by moving a little out of its comfort zone for once, and opting for silicon-carbon batteries from the get-go. Sloth, thy brand is Apple.<\/p>\n
Silicon-carbon batteries could have ensured plenty of juice for the iPhone Air, even with its slim form-factor<\/h2>\n![\"Two](\"https:\/\/cdn.wccftech.com\/wp-content\/uploads\/2025\/10\/Silicon-Carbon-Batteries.png\")
Image Source: HONOR<\/figcaption><\/figure>\nConventional lithium-ion batteries typically consist of a lithium oxide cathode and a graphite anode. As the battery is discharged, lithium ions move from the anode to the cathode by traversing the electrolyte, which is usually made up of a polymer in Li-Pol batteries.<\/p>\n
Simultaneously, the positively charged anode attracts negatively charged anions, which then\u00a0chemically react with the anode, giving up electrons in the process<\/a>. These liberated electrons can’t traverse the electrolyte and so take the path of the external circuit, powering electronic devices in the process. That’s chemistry 101.<\/p>\nSilicon-carbon (Si-C) batteries differ slightly from conventional lithium-ion ones in their choice of the anode, opting for a silicon anode instead of one made of graphite. Specifically, the anode here consists of a nanostructured silicon-carbon composite material.<\/p>\n
So, what’s the catch? Well, a silicon anode can hold up to 10x as many lithium ions, essentially increasing the battery’s capacity by orders of magnitude.<\/p>\n
Of course, it was this capacity of Si-C batteries to soak up to 10x as many lithium ions that had remained a huge bane for a long time: the anode would swell up and deform the entire battery. The solution: adding\u00a0fracture-resistant carbon nanostructures to silicon<\/a>.<\/p>\nXiaomi, HONOR, and Tecno smartphones are all using silicon-carbon batteries<\/strong><\/p>\nMany Chinese brands have started using silicon-carbon batteries in their smartphones lately, including Xiaomi, HONOR, and Tecno. And, these are some of the slimmest phones around:<\/p>\n
\n- The HONOR Magic V3 measures just\u00a09.2mm when folded<\/a>\u00a0and an unbelievable 4.35mm when unfurled.<\/li>\n
- The HONOR Magic V5 goes a step further, spanning just\u00a08.8mm when folded<\/a>\u00a0and an eye-popping 4.1mm when unfolded.<\/li>\n
- The OPPO Find N5 spans just\u00a04.21mm when unfolded<\/a>.<\/li>\n
- The Tecno Pova Slim 5G has a width of just\u00a05.95mm<\/a>.<\/li>\n<\/ol>\n
For comparison, Apple’s iPhone Air is just a tad slimmer than the Tecno Pova Slim 5G, at 5.6mm thick. However, the Tecno phone has a 5,160mAh silicon-carbon battery vs. the iPhone Air’s 3,149mAh battery.<\/p>\n
To put this into perspective, Apple’s iPhone Air is just 6 percent slimmer than the Tecno Pova Slim 5G, but bears a battery that is around 39 percent smaller!<\/p>\n
Now, consider a scenario where Apple might have chosen to pair its iPhone Air with a ~5,000mAh silicon-carbon battery. Remember, the iPhone 17 Pro Max has a battery capacity of 5,088mAh. Wouldn’t that have constituted a recipe for instant success?<\/p>\n
Of course, I can understand why Apple chose not to go with silicon-carbon batteries. Even with fracture-resistant carbon nanostructures, these batteries still\u00a0expand by around 20 percent<\/a>\u00a0when fully charged.<\/p>\nThis constant expansion and deflation takes a toll on the battery’s longevity, with substantial degradation taking place within 2 to 3 years.<\/p>\n
Ultimately, Apple had a choice: either produce a functional and very capable ultra-slim iPhone whose battery capacity degraded a bit faster, or opt for a functionally handicapped phone that was all show and no substance.<\/p>\n
We all know the choices that Apple ended up making. And, the iPhone Air’s tanking sales are a testament to its flawed decision-making process, at least in this instance.<\/p>\n
Yet, Apple could have easily avoided all the brouhaha around the iPhone Air’s gimped battery by moving a little out of its comfort zone for once, and opting for silicon-carbon batteries from the get-go. Sloth, thy brand is Apple.<\/p>\n
Silicon-carbon batteries could have ensured plenty of juice for the iPhone Air, even with its slim form-factor<\/h2>\nImage Source: HONOR<\/figcaption><\/figure>\nConventional lithium-ion batteries typically consist of a lithium oxide cathode and a graphite anode. As the battery is discharged, lithium ions move from the anode to the cathode by traversing the electrolyte, which is usually made up of a polymer in Li-Pol batteries.<\/p>\n
Simultaneously, the positively charged anode attracts negatively charged anions, which then\u00a0chemically react with the anode, giving up electrons in the process<\/a>. These liberated electrons can’t traverse the electrolyte and so take the path of the external circuit, powering electronic devices in the process. That’s chemistry 101.<\/p>\nSilicon-carbon (Si-C) batteries differ slightly from conventional lithium-ion ones in their choice of the anode, opting for a silicon anode instead of one made of graphite. Specifically, the anode here consists of a nanostructured silicon-carbon composite material.<\/p>\n
So, what’s the catch? Well, a silicon anode can hold up to 10x as many lithium ions, essentially increasing the battery’s capacity by orders of magnitude.<\/p>\n
Of course, it was this capacity of Si-C batteries to soak up to 10x as many lithium ions that had remained a huge bane for a long time: the anode would swell up and deform the entire battery. The solution: adding\u00a0fracture-resistant carbon nanostructures to silicon<\/a>.<\/p>\nXiaomi, HONOR, and Tecno smartphones are all using silicon-carbon batteries<\/strong><\/p>\nMany Chinese brands have started using silicon-carbon batteries in their smartphones lately, including Xiaomi, HONOR, and Tecno. And, these are some of the slimmest phones around:<\/p>\n
\n- The HONOR Magic V3 measures just\u00a09.2mm when folded<\/a>\u00a0and an unbelievable 4.35mm when unfurled.<\/li>\n
- The HONOR Magic V5 goes a step further, spanning just\u00a08.8mm when folded<\/a>\u00a0and an eye-popping 4.1mm when unfolded.<\/li>\n
- The OPPO Find N5 spans just\u00a04.21mm when unfolded<\/a>.<\/li>\n
- The Tecno Pova Slim 5G has a width of just\u00a05.95mm<\/a>.<\/li>\n<\/ol>\n
For comparison, Apple’s iPhone Air is just a tad slimmer than the Tecno Pova Slim 5G, at 5.6mm thick. However, the Tecno phone has a 5,160mAh silicon-carbon battery vs. the iPhone Air’s 3,149mAh battery.<\/p>\n
To put this into perspective, Apple’s iPhone Air is just 6 percent slimmer than the Tecno Pova Slim 5G, but bears a battery that is around 39 percent smaller!<\/p>\n
Now, consider a scenario where Apple might have chosen to pair its iPhone Air with a ~5,000mAh silicon-carbon battery. Remember, the iPhone 17 Pro Max has a battery capacity of 5,088mAh. Wouldn’t that have constituted a recipe for instant success?<\/p>\n
Of course, I can understand why Apple chose not to go with silicon-carbon batteries. Even with fracture-resistant carbon nanostructures, these batteries still\u00a0expand by around 20 percent<\/a>\u00a0when fully charged.<\/p>\nThis constant expansion and deflation takes a toll on the battery’s longevity, with substantial degradation taking place within 2 to 3 years.<\/p>\n
Ultimately, Apple had a choice: either produce a functional and very capable ultra-slim iPhone whose battery capacity degraded a bit faster, or opt for a functionally handicapped phone that was all show and no substance.<\/p>\n
We all know the choices that Apple ended up making. And, the iPhone Air’s tanking sales are a testament to its flawed decision-making process, at least in this instance.<\/p>\n
Conventional lithium-ion batteries typically consist of a lithium oxide cathode and a graphite anode. As the battery is discharged, lithium ions move from the anode to the cathode by traversing the electrolyte, which is usually made up of a polymer in Li-Pol batteries.<\/p>\n
Simultaneously, the positively charged anode attracts negatively charged anions, which then\u00a0chemically react with the anode, giving up electrons in the process<\/a>. These liberated electrons can’t traverse the electrolyte and so take the path of the external circuit, powering electronic devices in the process. That’s chemistry 101.<\/p>\n Silicon-carbon (Si-C) batteries differ slightly from conventional lithium-ion ones in their choice of the anode, opting for a silicon anode instead of one made of graphite. Specifically, the anode here consists of a nanostructured silicon-carbon composite material.<\/p>\n So, what’s the catch? Well, a silicon anode can hold up to 10x as many lithium ions, essentially increasing the battery’s capacity by orders of magnitude.<\/p>\n Of course, it was this capacity of Si-C batteries to soak up to 10x as many lithium ions that had remained a huge bane for a long time: the anode would swell up and deform the entire battery. The solution: adding\u00a0fracture-resistant carbon nanostructures to silicon<\/a>.<\/p>\n Xiaomi, HONOR, and Tecno smartphones are all using silicon-carbon batteries<\/strong><\/p>\n Many Chinese brands have started using silicon-carbon batteries in their smartphones lately, including Xiaomi, HONOR, and Tecno. And, these are some of the slimmest phones around:<\/p>\n For comparison, Apple’s iPhone Air is just a tad slimmer than the Tecno Pova Slim 5G, at 5.6mm thick. However, the Tecno phone has a 5,160mAh silicon-carbon battery vs. the iPhone Air’s 3,149mAh battery.<\/p>\n To put this into perspective, Apple’s iPhone Air is just 6 percent slimmer than the Tecno Pova Slim 5G, but bears a battery that is around 39 percent smaller!<\/p>\n Now, consider a scenario where Apple might have chosen to pair its iPhone Air with a ~5,000mAh silicon-carbon battery. Remember, the iPhone 17 Pro Max has a battery capacity of 5,088mAh. Wouldn’t that have constituted a recipe for instant success?<\/p>\n Of course, I can understand why Apple chose not to go with silicon-carbon batteries. Even with fracture-resistant carbon nanostructures, these batteries still\u00a0expand by around 20 percent<\/a>\u00a0when fully charged.<\/p>\n This constant expansion and deflation takes a toll on the battery’s longevity, with substantial degradation taking place within 2 to 3 years.<\/p>\n Ultimately, Apple had a choice: either produce a functional and very capable ultra-slim iPhone whose battery capacity degraded a bit faster, or opt for a functionally handicapped phone that was all show and no substance.<\/p>\n We all know the choices that Apple ended up making. And, the iPhone Air’s tanking sales are a testament to its flawed decision-making process, at least in this instance.<\/p>\n\n