1. High Altitude Power Sources
What Kind of Battery?

2. Requirements
Temperature Tolerant
Lightweight (Energy Dense)

3. Temperature Vs Altitude

4. Minimum temperature: -60 degrees Celsius Maximum Weight: 2 Pounds

5. Lithium Iron Disulfide 297 -40 Lithium Polymer 250
Battery Technology
Energy Density
wH/kg
Mimimum Temperature (Celsius)
Lithium Ion
-20
Lithium Iron Disulfide
297
-40
Lithium Polymer
250
Nickel Metal Hydrate
60-120
-25
Nickel Cadmium
45-80
-20 (Arguably -40)
Alkaline
110
-10

6. Lithium Iron Disulfide
1.5 Volt, 0.2 Pounds x8
12 Volt, 1.6 Pounds
-40 Degrees Celsius Operating Temperature

7. Alternative Methods to Warming Battery
Distribute Heat From Hot Electronics
Air Flow
Use Battery as heat sink
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