Nordic ID

Wireless charging

Wireless charging is based on inductive charging technology and is compliant with Qi v1.2 specification. With the inductive charging technology, the power is transmitted between a transmitter and receiver coils placed closely together. The Nordic ID EXA51e acts as a transmitter and host device acts as a receiver. The coils of the transmitter and receiver must be aligned well to make the connection. Charging efficiency greatly depends on how well the coils are aligned. The wireless charging may not work or may work unreliably if the coils are misaligned. Please see section 1.6 for information about the coil location of the Nordic ID EXA51e. When wireless charging is powered from the battery of the Nordic ID EXA51e then wireless charging is disabled in following cases:

• Battery level of the Nordic ID EXA51e is < 10%
• The Nordic ID EXA51e goes to sleep mode

Please note that the Nordic ID EXA51e does not go into sleep mode and will keep wireless charging enabled when charged via the cradle or USB charger. Maximum charging power via the wireless charging when the Nordic ID EXA51e is charged is 5W. Maximum charging power via the wireless charging when the Nordic ID EXA51e is not charged is 2.5W (wireless charging power is delivered from the battery of the Nordic ID EXA51e).

Charging VIA USB

Host device can be charged via the cradle using a proper USB cable (the cradle contains an USB type-A connector). Maximum charging power via the cradle depends on charge level of the Nordic ID EXA51e battery. Maximum 7W charging power can be achieved when the battery of the Nordic ID EXA51e is full/almost full. When the Nordic ID EXA51e charges at full power then the maximum charging power of host device is limited to 4W.