Method, apparatus and computer program product for optimized device-to-device charging

Method, apparatus, and computer program product example embodiments provide device-to-device charging. According to an example embodiment of the invention, a method comprises receiving, by a first device (10), a user's selection of a charging criterion (14) for balancing stored charges in the first device's own battery and in a second device's (20) rechargeable battery; determining, by the first device, that recharging of the second device's rechargeable battery is required; computing, by the first device, an amount of charging required for the second device's rechargeable battery, in order to satisfy the user's selected charging criterion; and transmitting (50), by the first device, power provided by the first device's own battery, to the second device, for charging the second device's rechargeable battery until the present level of stored battery charge in the second device's rechargeable battery reaches the computed amount of charging required.