This is more of a curiosity than anything, but I recently bought 2 Ego C Twist 1000 mAh batteries and a charger. They use the 510 connector (far as I can tell, I'm new to all this) and I have a charger from my Blu starter kit that also uses the same connector. The Ego charger I bought says it outputs 4.2v 420mA and the Blu charger puts out 4.2v 100mA. Can I use the Blu charger for the Ego batteries? I'm no electrical engineer, but I think it would just take a lot longer to charge, right?