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Old 05-15-2019, 10:19 AM
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kayaker is online now
Join Date: Jul 2009
Location: Rural Western PA
Posts: 32,793
Originally Posted by FoieGrasIsEvil View Post
It's just a small battery with a 5/10 threading that has an actuator button and buttons to increase/decrease voltage. Has an LED readout up top that shows battery life, counts your draws in seconds for you automatically and shows when it's charging via a USB on the bottom.

The carts are disposable once emptied of oil.
OK, I've used ones like that. I'm currently using a pen without an on/off switch. When you draw on it, the battery automatically supplies power (I assume from a pressure difference activating a switch).