1.  In addition, there are external batteries.

2.  In its current form, the pharmacy chip is hardwired to an external battery pack and an unwieldy set of control wires.

3.  It is powered by an internal battery that is constantly recharged by an external battery pack, worn on a belt around the waist.

4.  The external battery pack that powers the AbioCor can be worn as an adjustable belt around the waist or held up by suspenders.

5.  An internal battery and controller regulate the pumping speed, and an external battery powers the device by passing electricity through the skin.

6.  An internal battery and controller regulate the pumping speed, and the external battery powers the device by passing electricity through the skin.

7.  An internal battery and controller regulates the pumping speed, and an external battery powers the device by passing electricity through the skin.

8.  An external battery powers the device by passing electricity across the skin.

9.  An external battery powers the device by passing electricity through the skin.

10.  An external battery powers the artificial heart by passing electricity through the skin.