lithium batteries

hi all
do lithium batteries, say 7.3volt hold there voltage and then stop, or does the voltage slowly drop off like ordinary rechargable ? this is when they are in use by the way.

Zacc, I do believe they drop off slowly to a point (not sure what voltage) before they shutdown.
Cheers

hi zacc,i have set our detectors up with a lithium polymer bat 5a/h fully charged 8.1 v very high power density only 20 mm thick about 120mm long by 45 wide,velcos nicely on the side of the detector,voltage drops of slowly as it discharges like any other batt,the internal v reg in the detector maintains a constant voltage till the batt drops to a certain value[around 7v, i think] then you will get a low voltage signal from the detector,cheers kiwi.

i will be trying them on an sd2100,dont know if that detector has any sort of voltage regulator

kiwi wrote:hi zacc,i have set our detectors up with a lithium polymer bat 5a/h fully charged 8.1 v very high power density only 20 mm thick about 120mm long by 45 wide,velcos nicely on the side of the detector,voltage drops of slowly as it discharges like any other batt,the internal v reg in the detector maintains a constant voltage till the batt drops to a certain value[around 7v, i think] then you will get a low voltage signal from the detector,cheers kiwi.

Kiwi,
What detectors are you running this on ? I use an extreme and need a spare battery.
Been thinking of regulating a 3 cell lipo but parts will cost a lot more.
What sort of time do you get from the 5000mah pack ?
Also into RC planes so I have lipo chargers etc.
Thanks