Lithium Polymer and
Nickel Metal Hydride.
Using Li-Po version
(brief description click here)
Interesting graphs using Li-Po Pro-Trak and graph software.
All cars using Li-Po cells should have a voltage cut-off fitted to prevent cells falling below the safety cut-off voltage recommended by the cell supplier.
The tests below would suggest that a car using 2 Li-Po cells should have a safety cut-off voltage of 3.4volts plus the recommended cut-off voltage of the cell supplier to prevent cell damage or even a hazardous situation. Assuming the cells should not be discharged below 2.9 volts then a safe cut-off voltage would be 6.3 volts (3.4 volts + 2.9 volts)
ie you have to assume 1 cell is at maximum
voltage at the end of discharge to prevent poor cells being over
discharged.
See below
