12 mL worth of battery ought to be able to handle most of those methods. That's about break-even, but better because you refill the same way you refill the comp

12 mL worth of battery ought to be able to handle most of those methods. That's about break-even, but better because you refill the same way you refill the computer and propulsion. Charge the battery and you're ready for more action, mess-free. If you can do the job with less than 12 mL of battery, it's a definite win.