Icon13
Serial Vapist
The size is on the GH site, also another member measured much earlier in this thread. They are 12630's or 12.4mmx63mm to be exact.
In order to custom make their own battery would cost a hell of a lot more R+D and production costs then the GH itself. There is only about 4-5 major battery makers. Samsung, Panasonic, LG, Sony, etc. Companioes like eFest buy from them and put their own wrapping on it. Also you have to be very careful when buying batteries from Trustfire and other Chinese companies because they tend to buy C and D bin batteries from the big companies which are not within spec and can't be trusted. A bin batteries are to exact spec, B bin are the batteries that don't make exact spec but are pretty close. C and D bin batteries are way more out of spec and these are what some Chinese companies buy and resell. Not to be trusted. It is almost common knowledge that any battery sold under a name with Fire in it, like Trustfire, are not to be trusted that they are in spec. eFest batteries were pretty bad for being within spec but they have seem to got there act together as more were being used for vaping.
This is why I would really like to know where GH gets their batteries from. We have known members who have either gotten batteries that are DOA or deteriorate very fast. Also one instance, that I know of, where the battery vented in the GH. If GH are getting batteries from these third party companies then who knows how reliable these batteries are.
Mostly true, except Chinese companies don't buy all their batteries from the major companies. There are a few big Chinese manufacturers who actually do make them. High quality cells too. There are more battery manufacturer's than just the major Korean/Japanese companies that you mentioned. It is true there are different grade cells, but the good ones will go to their bigger customers, while their smaller customers will get a better deal for lesser quality cells.
The battery companies order OEM batteries in a custom sleeve. They meet the specs on the spec sheet. However, the company who brands them for resell will flat out lie to you about the specs after the fact; even though they have the spec sheet. That same cell is branded under a dozen different brands, each one claiming different specs. The only real specs are the ones on the spec sheet directly from the factory.
I too would like to know where they get their batteries from. I will find out in good time. I have a guy who sources batteries from China for a living. If he cannot find them, then nobody can.