Consider having a tension-loaded mechanism, which dispenses the gel for half a second...
Then the motor operates to reset it, taking 4 or 5 seconds. Thus there is not so much instantaneous demand on the motor and the battery. Nor is it bad for the motor if the gel goes empty.
Tension can be stored in a spring, or clip, or elastic material.
Other parts of the mechanism can be:
* ratchet
* cam
* piston
* plunger
* accordion pleating
* rubber or plastic bulb
Etc.