The emWave2 device uses a high quality Lithium Ion rechargeable battery controlled by an on board battery management micro controller.
With one hour of use a day, we expect a lifetime of at least 5 years, providing it is recharged at least once a month, whether it has been used or not.
The battery is expected to have at least 85% of capacity after 500 full charge cycles.
Our recommendations are true for almost all products with Lithium Ion Batteries thus: We recommend charging your emWave2 for 2 hrs. right out of the box.
There isn't a memory effect so you can start a charging cycle whenever you choose.
The Battery in the emWave2 device is rechargeable but not replaceable.
Opening the emWave2 device will violate the warranty on your device.
NOTE: We do not recommend a deep discharge. (A deep discharge would be leaving it in a drawer for 6 months without charging it.)
Since all batteries self discharge after some time we recommend running a recharge cycle at least once a month.
If the emWave2 device is left unattended for 6 - 8 months or longer, the battery will deeply discharge on its own.
When plugged in, the emWave2 device power management will attempt to recover and recondition the battery.
The procedure under these conditions are as follows :
After a deep discharge, the unit will only turn on if it's connected to a power source. Plug it in and allow it to charge for 20 minutes.
Unplug the device for 5 minutes and plug it back in for 20 minutes. Repeat this procedure 3 times. Note: Usually, sometime during this process, the device lights will come on and the device will begin to charge.
After 3 rounds, unplug it from the power source and try to turn on the emWave2. If it turns on, plug it back in and continue to charge for 2 hours.
After 2 hours of continuous charging, unplug the device from the power source.
If it does not turn on, after you unplug it from the power source, your emWave2 battery has discharged to a point where it is now unrecoverable. You may continue to use it while connected to a power source or contact your vendor for emWave2 warranty/replacement information.