Why my Garmin speed sensor battery keeps draining

Sometimes, the Garmin Speed Sensor displays a low battery or stops operating after a few hours of inserting a fresh battery. This situation is very annoying. If this happens, it is an implication that the batteries are dead due to the high-power drain. Thus, it would be crucial for a Garmin Speed Sensor user to get it in full.

Battery drain is a critical concern for any mechanical device. This could result from issues like manufacturing flaws, technical problems, or other problems. The sensor is built with a magnetometer that may sometimes develop problems. It may be helpful to change the magnetometer. However, purchasing a new speed sensor is very simple and efficient instead of changing the magnetometer.

If you have issues with your Garmin speed sensor, particularly its battery, this article will greatly help you. It outlines the possible reasons for the Garmin Speed Sensor battery drain and various tips on maximizing the battery’s life. Additionally, find the best responses to the frequently asked questions on the Garmin speed sensor battery. Here we start;

Reasons why the Garmin speed sensor battery may drain

Garmin speed sensor battery keeps draining

There are various reasons why your Garmin speed will display low battery or stop functioning all of a sudden. Below are the possible reasons;

1. All-time Bluetooth activity

Bluetooth will ensure that the device is always connected to a speedometer. When the speed sensor is not in use and the devices are connected, the battery can quickly become depleted. When not in use, leaving the internet connection turned on is a big mistake. Always make sure that all of your connections are turned off once you are done with them.

2. The GPS tracking

When compared to Bluetooth, this feature is now considered to be very important. Since GPS can significantly contribute to a significant amount of battery drain, GPS tracking is only active when the device is in operation or navigation. I strongly advise you to leave it turned on until you require it.

3. Poor quality of the Sensor battery

The Garmin Speed Sensor uses one battery. After two rotations, the LED turns red to imply a low battery level. If the Speed sensor’s battery depletes quickly, the issue may be with the quality of your battery. The sensor is usually found at the back of the device. It should be considered whether to use an alternative brand.

4. Poor battery connection

A bad connection may cause the battery to drain unexpectedly. It most commonly happens when the sensor is spinning, causing the battery to become misplaced. This problem can be resolved by simply repositioning the Garmin speed sensor battery in its proper location.

5. A dead cadence sensor 

When a Cadence sensor fails, Duo trap sensors can be substituted. You may be able to notice it ticking, but there is still no light, and it is unable to catch up to 510.

6. Moisture

It is possible that your speed sensor has been drowned or has been accidentally wet. As a result, it will drain at a rapid rate. You must first dry it out with a hairdryer or place it in a rice bag to resolve this issue. This will aid in the drying of the moisture.

7. Different configurations of the system 

Sometimes the battery drains more quickly than usual due to incorrect settings or simply a change in the settings. First, try resetting your sensor to see if the default settings are any better.

8. An out-of-date software version

Because of an outdated version of the software, speed sensors may be unable to perform the tasks that may be required of them. If the sensor battery does not respond favorably and drains, try new software and update them.

·   It is understandable that having identified the possible causes of your Speed Sensor battery draining, you might be concerned about getting the sensor to work again. This can be done by maximizing the battery life of the Sensor battery.

Battery life maximization

How can one ensure that the battery has the longest possible life? You shouldn’t be concerned anymore. There are a variety of approaches that can be taken, as discussed further below;

i.  Turn on the Battery Saver Mode.  Battery-saving mode automatically changes the settings to extend the life of the battery for longer journeys. The screen is turned off during the activity. To wake up, you can activate automated alarms and tap the screen. GPS tracking points, as well as sensor data, are stored less often by Battery Save mode. As a result, the precision of data is decreased in speed, distance, and track.

  ii. Reduce the brightness of lighting or shorter time off (Display Settings).  Your screen is among the most energy-efficient components while understanding how to regulate its use significantly reduces your energy use. The more you check the screen for updates, the more your battery drains off. You have to restrict the length of time you use on your screen. Most phones automatically change brightness depending on the existing illumination, so you might have to do so each time you go to the screen. Nevertheless, it’s worth it if you receive an extra phone time of even a few minutes.

 iii. Select the interval of intelligent recording (Data Recording Settings). Smartphone battery use statistics show the most powerful apps. You may also verify which applications drain the most power on the background when actively utilizing them. You’ll see that most battery-powered applications have the highest display time. That’s sensible, and there’s nothing you can do until you modify your choice and use it. However, you may limit how you utilize apps in the background which consume energy.

 iv.  Turn on the car sleep characteristic (Using Auto Sleep). The Wake-Up Interval is distinctly assigned by each hub and is primarily handled behind the scenes, making it hard to verify or alter.

The battery life is significantly decreased if the gadget wakes up every minute and delivers a sensor read. Usually, the device battery level is indicated on the Wake-Up Interval.

 v.  Turn the wireless phone function off (Phone Settings). Apps or even an operating system are updated, and content download/streaming requires considerable electricity. It’s fantastic to listen to the music on iPhone users using Bluetooth rather than Airplay. Airplay rather than Bluetooth consumes more energy. Another option can allow you to preserve more power if you can utilize earbuds.

 vi. Choose the setting for GPS. Choose the best setting for GPS in which it will not consume a lot of power. GPS takes a lot more battery capacity; however, even GPS services are low in power consumption when properly controlled. If feasible, decrease display time by finding a location, for example, when using GPS. Make sure you completely examine and disable other apps on your memory that use location services and think about saving critical applications, for example, the ones your family tracks you.

Email and location applications can constantly sync, examine with new notifications verifying servers. Choose your main travel applications wisely and limit the background information for the others. Delete screen widgets such as stock applications or weather applications that offer unneeded power-saver mode, which inhibits background data consumption in some phones.

vii.  Disable all the battery saving apps

It appears the opposite, but the deactivation of any power-saving applications will retain the route with GPS application in its manner of design. Ensure that the options Battery Saver is OFF.

viii.  Remove sensors you don’t use anymore. If the sensor is not in use anymore, it is better to remove it to avoid unnecessary battery use when you forget to turn the connectivity off.

Frequently Asked Questions on Garmin sensor battery

a) What is causing my Garmin battery to drain so quickly?

The most obvious cause is the backlight. This can be the most significant contributing factor to your Garmin battery drain. When the backlight is turned on, having it set to 100 percent will drain a considerable amount of battery power. The manual backlight configuration consumes the least energy, while some settings, such as when a gesture activates the backlight, would drain the battery more quickly.

b) What is the expected lifespan of a Garmin battery?

Vivosmart HR’s rechargeable battery will last for about 5 days on a full charge. Various aspects, such as the backlight, the frequency of notifications, and the use of wrist-based heart rate monitoring, can reduce the amount of time between charges a device has.

c) Is it possible for Garmin to replace a battery?

Garmin has facilitated the task of battery replacement in most of their GPS devices. It also sells replacement batteries from its website. The batteries can also be acquired from retailers who sell electronic products. However, it is important to keep in mind that not all Garmin units come with batteries that the seller can substitute, and hence it is worth contacting Garmin for more details.


The drainage of the Garmin Speed sensor battery is rather surprising. One may be very frustrated. It is very deceptive not to get the information you need on time. Speed sensors are also useful for cycling as they help to track GPS too. Before buying the Garmin Sensor, you should always consider some of its operations and conditions. It would help if you were very careful with speed sensors. Together with this check, you may also grasp this crucial aspect better.

To conclude, applying the above steps will help solve the problem of battery drainage in your Garmin speed sensor. Always ensure you turn off mobile data and Wi-Fi in places that are not stable to minimize battery consumption. Additionally, it is vital not to expose your device to excessively warm or cold conditions that impact your battery life. If the provided tips do not resolve the battery drainage issue, the sensor should be replaced with a new one.

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