Leica GPS

Power usage - as measured in the lab

turned off 13.4mW

On with controller 3126mW

On WITHOUT controller 2680mW

our estimate is that with 163AH battery and 3hr recording it can last 7-8 months without sun, so with some sun topping up losses etc we should be OK over winter.

sleeping 197mW (mainly due to relay's 15mA)

Internal relay

Cuts out at 2.2V

Cuts in at 7V

Uses 193mW

Data

We need to confirm how many hours of recordings can fit onto the tiny 256MB CF card. (it may be less than mentioned in the spec about 200days?)

Measured voltage/current readings

GEF10

Date	Voltage (V)	Solar current (A)
20/10/12	13.6	0.5

GEF4

Date	Voltage (V)	Solar current (A)
20/10/12	14.6	0.6

GEF3

Date	Voltage (V)	Solar current (A)
20/10/12	13.5	2.1

GEF9

Date	Voltage (V)	Solar current (A)
20/10/12	14.8	0.6

GEF? (Morain)

Date	Voltage (V)	Solar current (A)
20/10/12	14.7	0.75