If the GPS is in the constant power socket it may draw the battery down to where it will need a jump to start. The GPS itself may have a built in sleep mode and that could save you. A modern car has more built in parasitic drain than the old models so adding more never helps.

During long trips in the first year, I would run the Garmin on just battery. It would, normally, last about two hours, sometimes slightly longer, before I had to plug it back in to the outlet. Now, the battery life varies, depending on when it was last charged.

AA batteries

You can view the unit ID, software version, regulatory information, and remaining battery percentage.

1. Hold the touchscreen to view the menu.
2. Select > > About.
3. Swipe to view the information.

Garmin has made replacing the battery in many of their GPS units simple. It also sells the replacement batteries on its website, or they can be purchased at retailers that sell electronics. Note that not all units have a battery that can be replaced by the owner, and it’s best to contact Garmin for more information.

The only way to determine if the device is fully charged is to have it unplugged and on the main menu. On some models, the battery icon will be completely green when fully charged.

If you’re looking at the Garmin Forerunner line, the Garmin Forerunner 45, 245, 745, and 945 are compatible with Body Battery. This can be a reason to choose the Garmin 245 over the older 235. If you’re looking at the Vivoactive line, the Garmin Vivoactive 4 and 4s are compatible with Body Battery.

Inadequate sleep. A good night’s sleep is your best opportunity to recharge your Body Battery to near max capacity. There is a huge difference between 90 or 60 in the morning. Improving your bedtime routines and making decisions that promote good sleep can have an enormous impact on your Body Battery.

Your device analyzes your heart rate variability, stress level, sleep quality, and activity data to determine your overall Body Battery™ level. Like a gas gauge on a car, it indicates your amount of available reserve energy.

A vigorous activity will drain the battery faster, but this is not necessarily a bad thing. Regular exercise, activity, and recovery should increase the body’s resiliency and stamina over time.

This is probably the least surprising learning on the whole list, but it’s interesting to note that the Garmin’s ‘stress’ detection is at least accurate enough to differentiate between a working day and a weekend.

If, after fully charging a Garmin Pro Series device it shows a flashing red light immediately after disconnecting from the charger, please contact Garmin support by returning to the previous page and selecting the Contact Us option at the bottom that works best for you.

To update the Garmin Red Light and Speed Cameras if you have a One Year Subscription or Free Trial, use Garmin Express:

1. Open Garmin Express.
2. Select the device to update.
3. Click Tools & Content.
4. Click the Purchased tab.
5. Click the download icon next to the subscription to update.

Oh, and sensor-wise it supports: heart rate, headphones, cycling speed/cadence, running footpod, Tempe (temperature sensor), ANT+ cycling lights, ANT+ cycling radar, as well as golfing club sensors. Note for most of those above it’ll support both the Bluetooth Smart & ANT+ variants of them.

Pulse oximetry (or Pulse Ox, for short) is a noninvasive method used to measure the saturation of oxygen in the bloodstream. Compatible devices use a combination of red and infrared lights with sensors on the back of the device which can determine the percentage of oxygenated blood (SpO2%) available in your blood.

Pulse oximeters should be read with about +/-3 percent confidence, “so a reading of 95 percent could be as low as 92 percent or as high as 98 percent.” The technology in today’s wearable tech does differ slightly from what you’ll find traditionally in pulse oximeters used in hospitals.

pulse ox on the FR945 show 92-95%, regular “pulse ox on finger” show 99-98%.