Hi.
The Joye 510 battery has a female connector and is compatible with Joye 510 atomizers and cartomizers (or others through an adapter). It operates at 3.2v (regulated). It is available in auto and manual versions. The auto versions have a sound operated switch and have a reputation as being somewhat sensitive and unreliable. They are available in 2 sizes - Standard (180 mah auto/150 mah manual) and Mega (280 mah).
The KR808D-1 battery has a male connector and is compatible with KR808-D1 cartomizers, and DSE901 atomizers (or others through an adapter). The Kanger version operates at 3.7v (some may operate at 3.3v like the version made by
Microcig). It is available in auto and manual versions. The auto ones I have used have a vacuum switch, which is not affected by sound and works reasonably well. They are available in three sizes - the std 280 mah, a very long 380 mah XL battery, and a rarer short battery (uncertain on mah).
The "better" one is the one that suits your atomizer/cartomizer (I prefer not to use adapters if possible). They're both perfectly functional batteries.
I don't know the thread sizes and pitches sorry. This web site has a picture comparison of various models, although it looks like it hasn't been updated in a while -
E-Cigarette Models
Hope this helps
