A post on the HG2 is long overdue.
While the original release of the LG HG2 was in 2014, production has become available in Summer 2015. A 20 amp, 3000 mAh milestone is, in some way a holy grail of stats. A battery that can both be high-drain, and high-capacity is just what everyone wants. The LG HG2 can be seen as a 500mAh capacity upgrade from its predecessors the HE2/HE4 which also have a 20A discharge limit.
LG Chem is on a rolling schedule of releases and research, all planned years in advance. An average of between 6% and 10% increase in battery performance is expected, compounding yearly. That means, taking into account the battery specs and LG Chem's release schedule, the LG HG2 will likely be a good contender for one of the best 18650 batteries for some months to come for high-drain applications.
That said, there are many cases where the newest 18650 battery with the latest specs never gains mass adoption. That can be due to a number of reasons including a quick upgraded release, unforeseen safety problems, supply chain insecurity, market ignorance, and so forth. It's for that reason I am not crowning the HG2 as the new king on specs alone.
To test that claim, I'll do the standard Battery Bro review:
- Take a look at the HG2 specification sheet
- Visually inspect the battery
- Do three discharge tests
- Unwrap the battery
- Determine whether the HG2 deserves a noble title
HG2 Spec Sheet