Product Comparison
The portable energy storage market is made up of products that consist of different chemistries and provide varied output, densities and capacities. Competing market chemistries include nickelcadmium (Ni-CAD), nickel metal hydride (NIMH), lead-acid and Li-ion battery technologies. A performance comparison of competing technologies is listed below:
| Description | NIMH | Lead-Acid | Li Cobalt | LP SLiC |
| Safe from thermal runaway | Yes | No | No | Yes |
| Weight per 100 watt hours | 3 lbs | 5 lbs | 1 lbs | 2 lbs |
| Low maintenance | No | No | Yes | Yes (none) |
| Cycle life expectancy | Up to 500 | Up to 300 | Up to 400 | over 2000 |
| Holds its charge (loss per mo) | No (-50%) | Yes (-5%) | Yes (-1%) | Yes (-1%) |
| High temperatures | Good | Fair | Fair | Excellent |
| Cold weather performance | Good | Poor | Good | Best (-20C) |
| Low internal resistance | Yes | No | Yes | Yes |
| High-sustained voltage | No | No | No | Yes |
| Fast charge | No | No | No | Yes |
| Memory problems | Yes | Yes | No | none |
| Nominal voltage per cell | 1.2 volt | 2 volt | 3.6 volt | 3.2 volt |
| Power Stability/ Constant Voltage | Poor | Poor | Poor | Excellent |
| Environmental Safety/Disposal | Safe | Hazardous | Fair | Safest |
