Elithion
Re: K2 Energy ‘vs’ Calb
Comparing them for power applications:
K2 power cells: 44 s SDT
K2 energy cells: 81 s SDT
CALB cells: 163 s SDT
Therefore, for a given application, the K2 energy cells will be about twice as efficient as CALB cells and sag half as much, and the K2 power cells will be about 4 times as efficient as CALB cells and sag 1/4 as much.
K2 Energy Specs:
LFP 73AH Power Battery (1P)
(28P of LFP26650P)
AKA: LFP 300HPS
6.61 lbs each 
For 1800A sag = 2.3V
For 1800A (268V sag voltage) = 116S (766 lbs)
Calb Specs
CAFI Series
For 1800A 12C:
40AH = (4P) 1920A (12 lbs)
60AH = (2P) 1440A (8.8 lbs)
100AH = (2P) 2400A (14.8 lbs)
Weight for 1800A (268V sag) voltage pack? most likely way over 1200lbs.
Facts I have confirmed with K2 Energy engineers:
When our batteries have plenty of state of charge in them, you won’t harm them by discharging at 1.6V (~3000Amps in our 73Ah module). As they get hot, it will reduce their cycle life…but it also helps with their discharge voltage level (being warmer raises the voltage).
For a 3000 A discharge, our 73Ah module will have a voltage of 1.6V. 2500A would put you at about 2.0V on one of our 73Ah modules.
A couple of graphs that should help. 2500 A out of a single 73Ah module translates to 89A per cell. At 50A, our power cells will sustain the ~2.4V level for roughly 2.25 minutes
High Temperature Cells
The operating life of a battery, with HT technology, improves by as much as six times when compared to conventional lithium ion technology measured at 60 degrees C (140 degrees F).
LITHIUM ION 12v10
Introducing a lithium version smart battery to replace any 12v7 SLA battery application. At 9.6Ahr this battery is the highest capacity available at ANY discharge rate available on the market.
K2 Suzhou Factory
K2 is expanding with a new manufacturing facility now in Suzhou China.
SAFE
No Thermal Runaway
(self propagated rapid decomposition)
Passes Stringent UN/DOT Testing with No Circuit Protection
No Poisonous Chemicals
LONG LASTING
2000+ Cycles
3+ Year Shelf Life
Highest Energy Density LFP Batteries on the Market
CLEAN
Ingredients safe enough to use as soil to grow plants
No Heavy Metals
Recyclable18650E
K2’s high capacity battery is perfect for smaller applications.
FEATURES:
1.5Ahr
<40mOhm
2000+ Cycles
APPLICATIONS:
Portable Packs
Flashlights
Scooters
USB Powered Devices
18650P
Amazing power out of small battery.
FEATURES:
1.25Ahr
<19mOhm
2000+ Cycles
APPLICATIONS:
Cordless Drills
R/C Cars
Electric Starters
Power Tools
26650EV
K2’s flagship product is a hybrid of high capacity and high power, perfect for a wide range of uses.
FEATURES:
3.2Ah Real Capacity
15mOhm
Endless Possibilities
APPLICATIONS:
PHEV
Full Electric Cars
Back-Up Power
Electric Mobility
26650P
When high power is essential, this battery delivers with a burst of 150A from a single cell.
FEATURES:
2.6Ah Real Capacity
<9mOhm
Over 40A of continuous discharge
APPLICATIONS:
PHEV
Full Electric Cars
Back-Up Power
Electric Mobility