The most annoying part of the true smart watch is its endurance. Every day, I have to remember to charge my watch when I am not charging my mobile phone. The Apple Watch series has been updated to the sixth generation, but it is still charged every day, and it seems that Apple has no intention of improving its battery life. On December 9, it was reported that last week Apple had a patent for a "watch strap with battery" in the United States Patent Office, which is expected to "significantly improve" the battery life of the Apple Watch to one charge every two to three days.

According to the patent numbered 10849392, this solution is to place a series of strip batteries inside the watch strap like explosive bags, which are connected by a flexible circuit and supply power to the watch "without knowing it".

In fact, the leather watchband of Apple is close to this shape, and the appearance feasibility is relatively high. Considering that the battery of Apple Watch series has always been below 300mAh, this battery strap has a chance to double the life of the watch, right.

As a wearable device, it naturally needs to be fully sealed and waterproof. However, lithium batteries are fragile and dangerous chemicals after all. The core problem is how to ensure comfort while protecting the batteries in the watch strap from being flattened and bent in daily use. Of course, this is just a patent, and Apple may not turn it into reality.

In fact, there have been similar "Power Bank" watchbands before. For example, the Batfree watchband, which was crowdfunded in Kickstarter in 2019, is a very violent way to put batteries in the watchband, and finally to power the watch through wireless charging. The size and bulge are quite impressive, and the appearance is not very elegant. Its crowdfunding price is $45 (about 294 yuan), and its retail price is $79 (about 517 yuan).

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