Battery technology has improved very quickly in recent years. In just two or three years, Silicon-Carbon (Si/C) batteries have become popular in smartphones. These batteries can store more energy than traditional lithium-ion batteries. The Realme P4 Power is a good example of this new technology. It comes with a huge 10,001 mAh battery , which is almost twice the size of the usual 5,000 mAh smartphone battery. Even with such a large battery, the phone is not extremely thick or heavy. It is 9.1 mm thick and weighs 219 grams . So, it is still comfortable enough to use. Realme also says the battery can last for many years. With normal use, the company expects the battery to keep around 80% of its original capacity after 8 years . The Si/C battery technology is also more durable than traditional batteries. The phone supports 80W SuperVOOC fast charging . It can charge up to 50% in about 36 minutes . Since the battery is 10,001 mAh, 50% charge means around 5,000 mAh—almost the full b...