Yesterday I stumbled on the (relatively new) BAK INR2170-45D 4500mAh 60 amp battery. It turns out that there already have been some tests of it.
First some specs from the official BAK website:
Product Specifications
Materials
- Hi-Ni
Dimension(mm)
- Height:70.50±0.25Diameter:21.30±0.15
Nominal Voltage(V)
- 3.6
Typical Capacity(Ah)(0.2C)
- 4.5
Internal Resistance(mΩ)
- ≤5
Cell Weight(KG)
- ≤0.069
Max Discharge Rate
- 60A
Max Charge Rate
- 13.2A
Cycle Life(100% DOD 25°C)
- 600Cycles>60%(RT 8A/30A)
Operating Temperature Range(Cell Surface)
- charge : 0~55℃ Discharge :-20～80℃
There are already a few test results for these cells, including one from @Mooch which you can find here:
For a modest amount you can become a member of Mooch his Patreon and have acces to all the test results (and in the same time you also support Mooch in doing all these tests).
I also found an extensive test video of the 45D, which also compares it against their own numbers for the Ampace JP40, EVE 40PL and Molicel P50B:
All in all it seems to be a quite good high drain 21700, but can’t reach the new standard set by the JP40. It does (more or less) perform on par with the 40PL and it also outperforms the P50B in several ways (certainly in temperature).
It depends for what price you can get these batteries, but these can be interesting cells if you can’t get one of the above mentioned cells (for a good price).
(For where I buy my batteries (Nkon), it is currently the cheapest, compared to the P50B and 40PL.)