with patented Nano-Phosphate technology, A123-18650 cells boast many advantages over Li-Poly, etc:
Safety, Faster Charge Rate, Cycle Life, Extended Shelf Life, Durable metal case and Lower cost

Nominal Voltage: 3.3V
Nominal Capacity 1000-1100mAh
Recommended Charge: 3A to 3.6V CCCV (constant current - constant voltage)
Recommended Fast Charge: 10A to 3.6V CCCV
Fast charge time: 15 minutes
Continuous Discharge: 30C
Pulse: 60C
Dimensions 18mm(0.72") dia. X 65mm(2.5") ht
Weight: 39 grams
Cycle Life at 10C discharge: 1000+
Applications: Power tools, RC racing car, high power EV, etc
Power: Over 3000 W/kg and 5800 W/L
Safety: Excellent abuse tolerance and environmentally friendly
Life: Excellent calendar life, 10X cycle life vs. Conventional