A system and/or method may be provided to assure a payment being made via a user device before the user device fully runs out of battery power. In particular, while a user device is running out of battery power, the system may allow a user to designate a merchant/user/service to which the user may make payments via a user device without user authentication and/or awareness. Under the same situation of low battery power, the system may also allow the user to make payments to a merchant/user/service with which the user frequently shops without user authentication and/or initial awareness. After the payment being made, the system may communicate with the user with further action, which requires no or low consumption of battery power.