By Laura Entis, Entrepreneur

As nectar was to the Greek gods, patents are to the tech industry.

It’s not atypical for big players – your Googles (GOOG), Apples (AAPL), Microsofts (MSFT) – to add thousands of them to their portfolios every year. While many are granted only to remain unused, the most interesting ones offer sneak peaks at possible future products.

Apple may not lead the tech pack in terms of quantity, but many of its patents have a distinctive ‘it’ factor. For example, take Apple’s patent for earbuds that—get this—actually stay in your ears! (Apple seems to have followed through on this one.)

If we had our way, the company would consider doing the same on all five patents listed below.

1. A battery that lasts days (or even weeks)

Filed in March and already approved, this patent for a “portable and cost-effective fuel cell system for a portable computing device” suggests the tech giant is exploring ways to increase battery life for its array of devices.

The referenced fuel cells, which most often combine hydrogen with oxygen to create electrical energy, can be far more efficient than other battery types, potentially enabling “continued operation of portable electronic devices for days or even weeks without refueling,” Apple notes in the patent.

Even if Apple does pursue this patent, it’ll likely be awhile until it’s incorporated into consumer products. But that doesn’t mean that a day-long—nay, week-long—battery life is an impossibility—just that it hasn’t happened yet.

2. Biometric-tracking headphones

Approved last winter but originally filed back in 2008, this patent refers to a headphone system with built in sensors that can detect a wearer’s heart rate, temperature and perspiration to track his or her movements and activity level.

This sounds pretty cool—but also kind of creepy, especially when you pair it with another one of Apple’s patent applications, which lays out plans to serve consumers targeted ads based on their biometric data.

3. Waterproof electronics

In March, Apple applied for a patent that details plans to protect “water sensitive” electronics parts by coating them with a hydrophobic coating. Water-resistant iGadgets? Yes, please.

4. A ‘walk-and-text’ feature

Back in 2012, Apple filed a patent for a “transparent based” texting system that would, presumably, streamline the difficult process of texting while walking. The idea is fairly simple: when an iPhone user texts, the device will display video images of what’s directly in front him or her (captured by its rear-facing camera), with semi-transparent text bubbles replacing the typical opaque texting backdrop.

It’s a silly one, yes, but we’d still want to see it in action.

5. Voicemail screener

Originally filed all the way back in 2003, last year Apple was finally granted a patent that would enable iPhone users to listen to voicemails as they’re being left, with the option to pick up mid-message. Almost takes you back to the landline era.

6. Car-finder

Losing your car in a crowded parking lot is a uniquely hellish experience. It’s frustrating, but it also makes you feel kinda dumb.

As with the other listed items, a pair of patents filed in 2013 suggests Apple may be working to solve an all-too-common problem. The patents detail how an iPhone could establish a Bluetooth connection with a car and, using triggers such as open doors or shuttered ignitions, determine where it is parked and guide its owner to the location via digital breadcrumbs.

More from Entrepreneur:

Apple’s Latest Patent Tracks Temperature, Perspiration and Heart Rate—in Your Headphones

A Way to Waterproof Your iPhone? Apple Is Looking Into It.

Want to Text and Walk and Still See Where You’re Going? Apple Has a Patent for That.