I'm going to look into this tonight. The spec printed on the charger should answer the question.
The problem I have with this is that the eGO kit comes with a USB charger. Given USB output being the limiting factor, I can't see the eGO usb charger being any different than the 510 USB charger.. so...
Either the USB charger is really slow charging the eGO or the eGO charger should be able to charge both. (Clearly error on the side of safty here untill I get the chance to risk my workbench to an exploding 510 batt

I'm not recomending anything just thinking out loud)