Lithium battery technology has made significant progress in fast charging, but the fast charging protocols of different standards are not fully compatible, and their compatibility depends on the collaborative work of the device, charger, and battery management system (BMS).

Fast charging compatibility key points

Charging protocols are at the core: There are several fast charging standards on the market, such as Qualcomm's Quick Charge (QC), USB Implementers Forum's USB Power Delivery (PD), Huawei's SuperCharge, OPPO's VOOC, etc. These protocols enable fast charging through different means, such as boosting voltage, current, or both A device usually only supports one or a few specific charging protocols. If the charger and the protocol supported by the device do not match, charging will not enter fast charging mode and can only be charged at standard 5V/2A (10W) or lower.

Physical Interface and Electrical Specifications: While USB-C interfaces have become mainstream and support the PD protocol, not all USB-C chargers support PD. In addition, some manufacturers' private fast charging protocols, such as VOOC, require specific chargers and cables to activate, even if they use the USB-C interface With a charger that is not original or does not support the same protocol, the device will often prompt "This accessory does not support fast charging" or something similar.

Negotiation mechanism between device and charger: Modern smart devices and chargers negotiate a "handshake" when connected to determine the maximum charging power supported by both parties. If negotiation fails, the system is automatically downgraded to safe universal power mode. This explains why charging is sometimes slower with a third-party charger.

Technological Breakthroughs and Trends: Although you mentioned that "there is no breakthrough in technology", the reality is that lithium battery materials (such as silicon carbon anode, high nickel cathode) and charge management technology (such as multi-pole lug design, intelligent temperature control) have been improving, allowing the battery to withstand higher charging currents. At the same time, the USB PD protocol is becoming an increasingly popular standard, helping to improve compatibility between devices of different brands. However, private protocols still have compatibility barriers due to their proprietary nature.

Safety Warning: Do not mix chargers

Never use a charger designed for other types of batteries, such as lead-acid batteries, to charge lithium batteries. The voltage and charging curve of lead-acid battery chargers seriously do not match the demand of lithium batteries, which can easily lead to overcharging, heating, bulging and even fire and explosion of lithium batteries. Even if it is a lithium battery, try to use an original or certified special charger to ensure an accurate match of voltage, current, and protection mechanisms (such as overcharge protection, temperature protection).

Summary: Fast charging technology for lithium batteries is constantly evolving, but compatibility issues with different standards still exist. For the best charging experience and to ensure safety, it is highly recommended to use the original or officially certified charger for the device .