"batterylow" and "batterycritical" events while device is charging?

User expects to receive battery warnings if the battery is draining and falls below some threshold, but Cordova JavaScript logic does not take the previous battery level into account so level === 20 will fire a "batterylow" regardless if charge is going up from 19 to 20 or down from 21 to 20. It seems like an unintended quirk of the implementation, not what user would expect.

See also CB-4519, which is closely related to this.