Ah.... I'm new to the forum, I wasn't aware that you guys let threads die off like that. I've noticed that I was wasting a bit of juice doing the rubber cap method, so the logic is apparent. Using a syringe is probably the BEST way to fill with a consistent amount, but I'm hesitant with the syringe method due to the fact that I have Tourette's and if I happen to have a twitch at the wrong time, it could have BAD consequences... (What WOULD be the effect of a cart worth of juice accidently being injected into your bloodstream? I imagine it wouldn't be good!). Maybe using a pipette with a very small diameter nozzle would suffice in filling from the bottom? I don't like the idea of putting juice directly on the part that contacts the battery.