how much battery life does leaving bluetooth use

While newer Bluetooth Low Energy chips consume approximately 15 mA, energy consumption of a typical Bluetooth chip is twice as high. In comparison to Bluetooth, NFC is a more energy-saving standard for data transmission. In case the energy-saving mode is activated energy consumption is even lower (5 micro-amp). During sleep mode NFC chips only consume between 3 and 5 mA. However, scanning the environment requires much less energy than establishing a NFC connection. While in sleep mode NFC chips scan their environment for possible communication partners. This means, that NFC chips actually spend a lot of time in sleep mode. However, NFC chips are only seldom in active mode as even chips with higher memory capacity such as the NTAG 216 are read and written in under one second. Technical explanationįrom the documentation of a typical NFC-IC (NXP MFRC522) can be learned that NFC chips consume approximately 40 mA while reading or writing NFC tags (active mode). Therefore, both technologies already consume more battery power while only scanning their environment. For example, Bluetooth and RFID have a significantly higher reach than NFC (several meters vs. However, there are some important differences between NFC and other technologies for data transmission. Of course, Bluetooth and RFID chips also try to save battery consumption with similar mechanisms. Even when connected with another device NFC is much more energy efficient than similar technologies such as Bluetooth or RFID. As data are transferred very quickly via NFC, a NFC chip only needs to provide enough energy to establish a connection for very short time frames. Furthermore, scanning of the environment doesn’t require as much energy as establishing a connection to a NFC device. This frequency is sufficient to identify possible NFC connection partners quickly, but saves a lot of battery power. However, the NFC chip is actually in some kind of sleep mode and scans his environment only 10 times per second. In order to scan the environment, the NFC chip has to be active, which is the reason for the assumed high power consumption of the NFC function. The NFC chip inside the smartphone scans his environment regularly to detect NFC tags in reach. How is the power consumption reduced? Descriptive explanation However, NFC doesn’t have to be deactivated because several intelligent mechanisms ensure that NFC doesn’t become an energy guzzler. Sometimes such tips also recommend to deactivate the NFC function. Thus, it’s not surprising that many tips about saving battery power can be found on the Internet. Therefore, smartphone users feel that they have to charge their battery increasingly often.

Modern smartphones are constantly equipped with additional functions, but progress in battery research has been much slower.

How much battery life does leaving bluetooth use